56540261660 has 24 divisors (see below), whose sum is σ = 121943592960. Its totient is φ = 22004858304.

The previous prime is 56540261653. The next prime is 56540261663. The reversal of 56540261660 is 6616204565.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56540261663) 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 7 ways as a sum of consecutive naturals, for example, 38202140 + ... + 38203619.

It is an arithmetic number, because the mean of its divisors is an integer number (5080983040).

Almost surely, 2^56540261660 is an apocalyptic number.

It is an amenable number.

56540261660 is an abundant number, since it is smaller than the sum of its proper divisors (65403331300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56540261660 is a wasteful number, since it uses less digits than its factorization.

56540261660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76405805 (or 76405803 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 56540261660 in words is "fifty-six billion, five hundred forty million, two hundred sixty-one thousand, six hundred sixty".