55640604771 has 24 divisors (see below), whose sum is σ = 81390566400. Its totient is φ = 36625446000.

The previous prime is 55640604757. The next prime is 55640604791. The reversal of 55640604771 is 17740604655.

It is not a de Polignac number, because 55640604771 - 2⁶ = 55640604707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55640604731) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 116046 + ... + 353196.

It is an arithmetic number, because the mean of its divisors is an integer number (3391273600).

Almost surely, 2^55640604771 is an apocalyptic number.

55640604771 is a deficient number, since it is larger than the sum of its proper divisors (25749961629).

55640604771 is a wasteful number, since it uses less digits than its factorization.

55640604771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237487 (or 237484 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 45.

The spelling of 55640604771 in words is "fifty-five billion, six hundred forty million, six hundred four thousand, seven hundred seventy-one".