72440142864 has 40 divisors (see below), whose sum is σ = 187146748032. Its totient is φ = 24145461120.

The previous prime is 72440142847. The next prime is 72440142871. The reversal of 72440142864 is 46824104427.

It is a super-4 number, since 4×72440142864⁴ (a number of 45 digits) contains 4444 as substring.

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, 1620169 + ... + 1664279.

Almost surely, 2^72440142864 is an apocalyptic number.

It is an amenable number.

72440142864 is an abundant number, since it is smaller than the sum of its proper divisors (114706605168).

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

72440142864 is a wasteful number, since it uses less digits than its factorization.

72440142864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78335 (or 78329 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 42.

The spelling of 72440142864 in words is "seventy-two billion, four hundred forty million, one hundred forty-two thousand, eight hundred sixty-four".