55745991687 has 16 divisors (see below), whose sum is σ = 78035482368. Its totient is φ = 35330074560.

The previous prime is 55745991667. The next prime is 55745991787. The reversal of 55745991687 is 78619954755.

55745991687 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 55745991687 - 2²⁸ = 55477556231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55745991667) 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, 2467014 + ... + 2489507.

It is an arithmetic number, because the mean of its divisors is an integer number (4877217648).

Almost surely, 2^55745991687 is an apocalyptic number.

55745991687 is a deficient number, since it is larger than the sum of its proper divisors (22289490681).

55745991687 is a wasteful number, since it uses less digits than its factorization.

55745991687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4956710.

The product of its digits is 95256000, while the sum is 66.

The spelling of 55745991687 in words is "fifty-five billion, seven hundred forty-five million, nine hundred ninety-one thousand, six hundred eighty-seven".