671316715525 has 12 divisors (see below), whose sum is σ = 832880088964. Its totient is φ = 536764752000.

The previous prime is 671316715501. The next prime is 671316715541. The reversal of 671316715525 is 525517613176.

It can be written as a sum of positive squares in 6 ways, for example, as 67491363681 + 603825351844 = 259791^2 + 777062^2 .

It is not a de Polignac number, because 671316715525 - 2²⁹ = 670779844613 is a prime.

It is a super-2 number, since 2×671316715525² (a number of 24 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7168056 + ... + 7261105.

Almost surely, 2^671316715525 is an apocalyptic number.

It is an amenable number.

671316715525 is a deficient number, since it is larger than the sum of its proper divisors (161563373439).

671316715525 is a wasteful number, since it uses less digits than its factorization.

671316715525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14431032 (or 14431027 counting only the distinct ones).

The product of its digits is 1323000, while the sum is 49.

The spelling of 671316715525 in words is "six hundred seventy-one billion, three hundred sixteen million, seven hundred fifteen thousand, five hundred twenty-five".