872580821695 has 16 divisors (see below), whose sum is σ = 1202408023680. Its totient is φ = 601204010400.

The previous prime is 872580821681. The next prime is 872580821699. The reversal of 872580821695 is 596128085278.

It is not a de Polignac number, because 872580821695 - 2²¹ = 872578724543 is a prime.

It is a super-2 number, since 2×872580821695² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (872580821699) 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, 417501741 + ... + 417503830.

It is an arithmetic number, because the mean of its divisors is an integer number (75150501480).

Almost surely, 2^872580821695 is an apocalyptic number.

872580821695 is a deficient number, since it is larger than the sum of its proper divisors (329827201985).

872580821695 is a wasteful number, since it uses less digits than its factorization.

872580821695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 835005606.

The product of its (nonzero) digits is 19353600, while the sum is 61.

The spelling of 872580821695 in words is "eight hundred seventy-two billion, five hundred eighty million, eight hundred twenty-one thousand, six hundred ninety-five".