39906054636 has 48 divisors (see below), whose sum is σ = 106465873920. Its totient is φ = 11396401920.

The previous prime is 39906054581. The next prime is 39906054641. The reversal of 39906054636 is 63645060993.

It is a happy number.

It is a super-2 number, since 2×39906054636² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71605 + ... + 291443.

It is an arithmetic number, because the mean of its divisors is an integer number (2218039040).

Almost surely, 2^39906054636 is an apocalyptic number.

It is an amenable number.

39906054636 is an abundant number, since it is smaller than the sum of its proper divisors (66559819284).

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

39906054636 is a wasteful number, since it uses less digits than its factorization.

39906054636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222014 (or 222012 counting only the distinct ones).

The product of its (nonzero) digits is 3149280, while the sum is 51.

The spelling of 39906054636 in words is "thirty-nine billion, nine hundred six million, fifty-four thousand, six hundred thirty-six".