55657120707 has 24 divisors (see below), whose sum is σ = 83453348160. Its totient is φ = 37068169320.

The previous prime is 55657120691. The next prime is 55657120801. The reversal of 55657120707 is 70702175655.

It is a happy number.

55657120707 is a `hidden beast` number, since 5 + 5 + 6 + 571 + 2 + 0 + 70 + 7 = 666.

It is not a de Polignac number, because 55657120707 - 2⁴ = 55657120691 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55657122707) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 135232 + ... + 360002.

It is an arithmetic number, because the mean of its divisors is an integer number (3477222840).

Almost surely, 2^55657120707 is an apocalyptic number.

55657120707 is a deficient number, since it is larger than the sum of its proper divisors (27796227453).

55657120707 is a wasteful number, since it uses less digits than its factorization.

55657120707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225805 (or 225793 counting only the distinct ones).

The product of its (nonzero) digits is 514500, while the sum is 45.

The spelling of 55657120707 in words is "fifty-five billion, six hundred fifty-seven million, one hundred twenty thousand, seven hundred seven".