611420866560 has 1920 divisors, whose sum is σ = 2679002726400. Its totient is φ = 130427781120.

The previous prime is 611420866513. The next prime is 611420866613. The reversal of 611420866560 is 65668024116.

611420866560 is a `hidden beast` number, since 6 + 1 + 1 + 4 + 2 + 0 + 86 + 6 + 560 = 666.

It is a tau number, because it is divible by the number of its divisors (1920).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 7739504601 + ... + 7739504679.

It is an arithmetic number, because the mean of its divisors is an integer number (1395313920).

Almost surely, 2^611420866560 is an apocalyptic number.

611420866560 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 611420866560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1339501363200).

611420866560 is an abundant number, since it is smaller than the sum of its proper divisors (2067581859840).

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

611420866560 is a wasteful number, since it uses less digits than its factorization.

611420866560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199 (or 170 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The spelling of 611420866560 in words is "six hundred eleven billion, four hundred twenty million, eight hundred sixty-six thousand, five hundred sixty".