8625981471391 has 4 divisors (see below), whose sum is σ = 8626067255232. Its totient is φ = 8625895687552.

The previous prime is 8625981471343. The next prime is 8625981471407. The reversal of 8625981471391 is 1931741895268.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8625981471391 - 2²⁵ = 8625947916959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8625981471791) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42740911 + ... + 42942256.

It is an arithmetic number, because the mean of its divisors is an integer number (2156516813808).

Almost surely, 2^{8625981471391} is an apocalyptic number.

8625981471391 is a deficient number, since it is larger than the sum of its proper divisors (85783841).

8625981471391 is a wasteful number, since it uses less digits than its factorization.

8625981471391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85783840.

The product of its digits is 26127360, while the sum is 64.

The spelling of 8625981471391 in words is "eight trillion, six hundred twenty-five billion, nine hundred eighty-one million, four hundred seventy-one thousand, three hundred ninety-one".