61227921924 has 72 divisors (see below), whose sum is σ = 171889089120. Its totient is φ = 18839354976.

The previous prime is 61227921919. The next prime is 61227921943. The reversal of 61227921924 is 42912972216.

61227921924 is a `hidden beast` number, since 612 + 2 + 7 + 9 + 2 + 1 + 9 + 24 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 61227921924.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1659042 + ... + 1695545.

It is an arithmetic number, because the mean of its divisors is an integer number (2387348460).

Almost surely, 2^61227921924 is an apocalyptic number.

It is an amenable number.

61227921924 is an abundant number, since it is smaller than the sum of its proper divisors (110661167196).

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

61227921924 is a wasteful number, since it uses less digits than its factorization.

61227921924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3354626 (or 3354605 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The spelling of 61227921924 in words is "sixty-one billion, two hundred twenty-seven million, nine hundred twenty-one thousand, nine hundred twenty-four".