55661062772 has 48 divisors (see below), whose sum is σ = 111617146368. Its totient is φ = 23791622400.

The previous prime is 55661062763. The next prime is 55661062789. The reversal of 55661062772 is 27726016655.

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 15 ways as a sum of consecutive naturals, for example, 26045288 + ... + 26047424.

It is an arithmetic number, because the mean of its divisors is an integer number (2325357216).

Almost surely, 2^55661062772 is an apocalyptic number.

It is an amenable number.

55661062772 is an abundant number, since it is smaller than the sum of its proper divisors (55956083596).

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

55661062772 is a wasteful number, since it uses less digits than its factorization.

55661062772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4176 (or 4174 counting only the distinct ones).

The product of its (nonzero) digits is 1058400, while the sum is 47.

The spelling of 55661062772 in words is "fifty-five billion, six hundred sixty-one million, sixty-two thousand, seven hundred seventy-two".