55657645641 has 32 divisors (see below), whose sum is σ = 91198504320. Its totient is φ = 33325152192.

The previous prime is 55657645639. The next prime is 55657645661. The reversal of 55657645641 is 14654675655.

55657645641 is a `hidden beast` number, since 5 + 5 + 6 + 5 + 76 + 4 + 564 + 1 = 666.

55657645641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55657645641 - 2¹ = 55657645639 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55657645661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2129835 + ... + 2155808.

It is an arithmetic number, because the mean of its divisors is an integer number (2849953260).

Almost surely, 2^55657645641 is an apocalyptic number.

It is an amenable number.

55657645641 is a deficient number, since it is larger than the sum of its proper divisors (35540858679).

55657645641 is a wasteful number, since it uses less digits than its factorization.

55657645641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4285702 (or 4285696 counting only the distinct ones).

The product of its digits is 15120000, while the sum is 54.

The spelling of 55657645641 in words is "fifty-five billion, six hundred fifty-seven million, six hundred forty-five thousand, six hundred forty-one".