55657477162540 has 48 divisors (see below), whose sum is σ = 127506834524160. Its totient is φ = 20238985126080.

The previous prime is 55657477162517. The next prime is 55657477162543. The reversal of 55657477162540 is 4526177475655.

It is a happy number.

It is a Smith number, since the sum of its digits (64) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (55657477162543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57924469 + ... + 58877491.

It is an arithmetic number, because the mean of its divisors is an integer number (2656392385920).

Almost surely, 2^{55657477162540} is an apocalyptic number.

It is an amenable number.

55657477162540 is an abundant number, since it is smaller than the sum of its proper divisors (71849357361620).

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

55657477162540 is a wasteful number, since it uses less digits than its factorization.

55657477162540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1218502 (or 1218500 counting only the distinct ones).

The product of its (nonzero) digits is 246960000, while the sum is 64.

The spelling of 55657477162540 in words is "fifty-five trillion, six hundred fifty-seven billion, four hundred seventy-seven million, one hundred sixty-two thousand, five hundred forty".