72872156847 has 32 divisors (see below), whose sum is σ = 115225657344. Its totient is φ = 40086914400.

The previous prime is 72872156843. The next prime is 72872156867. The reversal of 72872156847 is 74865127827.

It is not a de Polignac number, because 72872156847 - 2² = 72872156843 is a prime.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72872156843) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 168693 + ... + 417374.

It is an arithmetic number, because the mean of its divisors is an integer number (3600801792).

Almost surely, 2^72872156847 is an apocalyptic number.

72872156847 is a deficient number, since it is larger than the sum of its proper divisors (42353500497).

72872156847 is a wasteful number, since it uses less digits than its factorization.

72872156847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 586299.

The product of its digits is 10536960, while the sum is 57.

The spelling of 72872156847 in words is "seventy-two billion, eight hundred seventy-two million, one hundred fifty-six thousand, eight hundred forty-seven".