54640631128 has 32 divisors (see below), whose sum is σ = 105161457600. Its totient is φ = 26606232352.

The previous prime is 54640631057. The next prime is 54640631153. The reversal of 54640631128 is 82113604645.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 490450 + ... + 591457.

It is an arithmetic number, because the mean of its divisors is an integer number (3286295550).

Almost surely, 2^54640631128 is an apocalyptic number.

It is an amenable number.

54640631128 is a deficient number, since it is larger than the sum of its proper divisors (50520826472).

54640631128 is a wasteful number, since it uses less digits than its factorization.

54640631128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1082079 (or 1082075 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 40.

The spelling of 54640631128 in words is "fifty-four billion, six hundred forty million, six hundred thirty-one thousand, one hundred twenty-eight".