611530656 has 192 divisors, whose sum is σ = 1908748800. Its totient is φ = 169344000.

The previous prime is 611530651. The next prime is 611530687. The reversal of 611530656 is 656035116.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (611530651) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 581331 + ... + 582381.

It is an arithmetic number, because the mean of its divisors is an integer number (9941400).

Almost surely, 2^611530656 is an apocalyptic number.

611530656 is a gapful number since it is divisible by the number (66) 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 611530656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (954374400).

611530656 is an abundant number, since it is smaller than the sum of its proper divisors (1297218144).

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

611530656 is a wasteful number, since it uses less digits than its factorization.

611530656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1123 (or 1115 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 33.

The square root of 611530656 is about 24729.1458809236. The cubic root of 611530656 is about 848.8013813939.

The spelling of 611530656 in words is "six hundred eleven million, five hundred thirty thousand, six hundred fifty-six".