54640412565615 has 48 divisors (see below), whose sum is σ = 98044574191200. Its totient is φ = 28116953899776.

The previous prime is 54640412565593. The next prime is 54640412565617. The reversal of 54640412565615 is 51656521404645.

It is a happy number.

54640412565615 is a `hidden beast` number, since 5 + 4 + 6 + 4 + 0 + 4 + 12 + 5 + 6 + 5 + 615 = 666.

It is not a de Polignac number, because 54640412565615 - 2¹⁸ = 54640412303471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54640412565617) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12808420 + ... + 16532889.

It is an arithmetic number, because the mean of its divisors is an integer number (2042595295650).

Almost surely, 2^{54640412565615} is an apocalyptic number.

54640412565615 is a deficient number, since it is larger than the sum of its proper divisors (43404161625585).

54640412565615 is a wasteful number, since it uses less digits than its factorization.

54640412565615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29342776 (or 29342773 counting only the distinct ones).

The product of its (nonzero) digits is 17280000, while the sum is 54.

The spelling of 54640412565615 in words is "fifty-four trillion, six hundred forty billion, four hundred twelve million, five hundred sixty-five thousand, six hundred fifteen".