39129215664 has 160 divisors (see below), whose sum is σ = 128405067264. Its totient is φ = 9971619840.

The previous prime is 39129215659. The next prime is 39129215737. The reversal of 39129215664 is 46651292193.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 96012 + ... + 295764.

Almost surely, 2^39129215664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39129215664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64202533632).

39129215664 is an abundant number, since it is smaller than the sum of its proper divisors (89275851600).

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

39129215664 is a wasteful number, since it uses less digits than its factorization.

39129215664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199835 (or 199829 counting only the distinct ones).

The product of its digits is 699840, while the sum is 48.

The spelling of 39129215664 in words is "thirty-nine billion, one hundred twenty-nine million, two hundred fifteen thousand, six hundred sixty-four".