611534880 has 384 divisors, whose sum is σ = 2475567360. Its totient is φ = 139345920.

The previous prime is 611534873. The next prime is 611534887. The reversal of 611534880 is 88435116.

611534880 is a `hidden beast` number, since 611 + 5 + 34 + 8 + 8 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (611534873) and next prime (611534887).

It is a super-2 number, since 2×611534880² = 747949818913228800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (611534887) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 807462 + ... + 808218.

It is an arithmetic number, because the mean of its divisors is an integer number (6446790).

Almost surely, 2^611534880 is an apocalyptic number.

611534880 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 611534880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1237783680).

611534880 is an abundant number, since it is smaller than the sum of its proper divisors (1864032480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

611534880 is a wasteful number, since it uses less digits than its factorization.

611534880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809 (or 795 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 611534880 is about 24729.2312860711. The cubic root of 611534880 is about 848.8033356861.

Adding to 611534880 its reverse (88435116), we get a palindrome (699969996).

The spelling of 611534880 in words is "six hundred eleven million, five hundred thirty-four thousand, eight hundred eighty".