72891473571 has 12 divisors (see below), whose sum is σ = 120328781872. Its totient is φ = 41652270576.

The previous prime is 72891473537. The next prime is 72891473591. The reversal of 72891473571 is 17537419827.

72891473571 is a `hidden beast` number, since 7 + 28 + 9 + 1 + 47 + 3 + 571 = 666.

It is not a de Polignac number, because 72891473571 - 2¹⁴ = 72891457187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72891473591) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 578503696 + ... + 578503821.

Almost surely, 2^72891473571 is an apocalyptic number.

72891473571 is a deficient number, since it is larger than the sum of its proper divisors (47437308301).

72891473571 is a wasteful number, since it uses less digits than its factorization.

72891473571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1157007530 (or 1157007527 counting only the distinct ones).

The product of its digits is 2963520, while the sum is 54.

The spelling of 72891473571 in words is "seventy-two billion, eight hundred ninety-one million, four hundred seventy-three thousand, five hundred seventy-one".