55661074928 has 20 divisors (see below), whose sum is σ = 112532173968. Its totient is φ = 26620513920.

The previous prime is 55661074811. The next prime is 55661074981. The reversal of 55661074928 is 82947016655.

It is a self number, because there is not a number n which added to its sum of digits gives 55661074928.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75626093 + ... + 75626828.

Almost surely, 2^55661074928 is an apocalyptic number.

It is an amenable number.

55661074928 is an abundant number, since it is smaller than the sum of its proper divisors (56871099040).

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

55661074928 is a wasteful number, since it uses less digits than its factorization.

55661074928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151252952 (or 151252946 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 53.

The spelling of 55661074928 in words is "fifty-five billion, six hundred sixty-one million, seventy-four thousand, nine hundred twenty-eight".