872018921594 has 32 divisors (see below), whose sum is σ = 1471451320080. Its totient is φ = 385503003648.

The previous prime is 872018921593. The next prime is 872018921617. The reversal of 872018921594 is 495129810278.

It can be written as a sum of positive squares in 8 ways, for example, as 817825409569 + 54193512025 = 904337^2 + 232795^2 .

It is not an unprimeable number, because it can be changed into a prime (872018921593) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11914877 + ... + 11987840.

Almost surely, 2^872018921594 is an apocalyptic number.

872018921594 is a deficient number, since it is larger than the sum of its proper divisors (599432398486).

872018921594 is a wasteful number, since it uses less digits than its factorization.

872018921594 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23902802.

The product of its (nonzero) digits is 2903040, while the sum is 56.

The spelling of 872018921594 in words is "eight hundred seventy-two billion, eighteen million, nine hundred twenty-one thousand, five hundred ninety-four".