39984655872 has 160 divisors (see below), whose sum is σ = 122082757632. Its totient is φ = 11391934464.

The previous prime is 39984655871. The next prime is 39984655883. The reversal of 39984655872 is 27855648993.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39984655871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3940918 + ... + 3951050.

Almost surely, 2^39984655872 is an apocalyptic number.

39984655872 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39984655872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61041378816).

39984655872 is an abundant number, since it is smaller than the sum of its proper divisors (82098101760).

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

39984655872 is a wasteful number, since it uses less digits than its factorization.

39984655872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10528 (or 10512 counting only the distinct ones).

The product of its digits is 130636800, while the sum is 66.

The spelling of 39984655872 in words is "thirty-nine billion, nine hundred eighty-four million, six hundred fifty-five thousand, eight hundred seventy-two".