72872156872 has 16 divisors (see below), whose sum is σ = 137844457740. Its totient is φ = 36113634816.

The previous prime is 72872156867. The next prime is 72872156891. The reversal of 72872156872 is 27865127827.

It can be written as a sum of positive squares in 2 ways, for example, as 67919656996 + 4952499876 = 260614^2 + 70374^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40304493 + ... + 40306300.

Almost surely, 2^72872156872 is an apocalyptic number.

It is an amenable number.

72872156872 is a deficient number, since it is larger than the sum of its proper divisors (64972300868).

72872156872 is a wasteful number, since it uses less digits than its factorization.

72872156872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80610912 (or 80610908 counting only the distinct ones).

The product of its digits is 5268480, while the sum is 55.

The spelling of 72872156872 in words is "seventy-two billion, eight hundred seventy-two million, one hundred fifty-six thousand, eight hundred seventy-two".