872104870657 has 4 divisors (see below), whose sum is σ = 872629288960. Its totient is φ = 871580452356.

The previous prime is 872104870649. The next prime is 872104870727. The reversal of 872104870657 is 756078401278.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 756078401278 = 2 ⋅378039200639.

It is a cyclic number.

It is not a de Polignac number, because 872104870657 - 2³ = 872104870649 is a prime.

It is a super-2 number, since 2×872104870657² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 872104870598 and 872104870607.

It is not an unprimeable number, because it can be changed into a prime (872104870757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 262206657 + ... + 262209982.

It is an arithmetic number, because the mean of its divisors is an integer number (218157322240).

Almost surely, 2^872104870657 is an apocalyptic number.

It is an amenable number.

872104870657 is a deficient number, since it is larger than the sum of its proper divisors (524418303).

872104870657 is a wasteful number, since it uses less digits than its factorization.

872104870657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524418302.

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

The spelling of 872104870657 in words is "eight hundred seventy-two billion, one hundred four million, eight hundred seventy thousand, six hundred fifty-seven".