36646642540 has 24 divisors (see below), whose sum is σ = 81008368560. Its totient is φ = 13887148608.

The previous prime is 36646642531. The next prime is 36646642567. The reversal of 36646642540 is 4524664663.

It is a happy 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, 48218887 + ... + 48219646.

It is an arithmetic number, because the mean of its divisors is an integer number (3375348690).

Almost surely, 2^36646642540 is an apocalyptic number.

It is an amenable number.

36646642540 is an abundant number, since it is smaller than the sum of its proper divisors (44361726020).

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

36646642540 is a wasteful number, since it uses less digits than its factorization.

36646642540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96438561 (or 96438559 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 46.

The spelling of 36646642540 in words is "thirty-six billion, six hundred forty-six million, six hundred forty-two thousand, five hundred forty".