55661773056 has 36 divisors (see below), whose sum is σ = 148141491792. Its totient is φ = 18553924096.

The previous prime is 55661772983. The next prime is 55661773081. The reversal of 55661773056 is 65037716655.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36237366 + ... + 36238901.

Almost surely, 2^55661773056 is an apocalyptic number.

It is an amenable number.

55661773056 is an abundant number, since it is smaller than the sum of its proper divisors (92479718736).

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

55661773056 is an equidigital number, since it uses as much as digits as its factorization.

55661773056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72476286 (or 72476272 counting only the distinct ones).

The product of its (nonzero) digits is 3969000, while the sum is 51.

The spelling of 55661773056 in words is "fifty-five billion, six hundred sixty-one million, seven hundred seventy-three thousand, fifty-six".