72039664332 has 54 divisors (see below), whose sum is σ = 188866655068. Its totient is φ = 24010432128.

The previous prime is 72039664273. The next prime is 72039664349. The reversal of 72039664332 is 23346693027.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

72039664332 is a `hidden beast` number, since 7 + 203 + 9 + 6 + 6 + 433 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (54).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 8363644 + ... + 8372252.

Almost surely, 2^72039664332 is an apocalyptic number.

It is an amenable number.

72039664332 is an abundant number, since it is smaller than the sum of its proper divisors (116826990736).

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

72039664332 is an frugal number, since it uses more digits than its factorization.

72039664332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17237 (or 8614 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 45.

The spelling of 72039664332 in words is "seventy-two billion, thirty-nine million, six hundred sixty-four thousand, three hundred thirty-two".