85625738431 has 4 divisors (see below), whose sum is σ = 90662546592. Its totient is φ = 80588930272.

The previous prime is 85625738417. The next prime is 85625738479. The reversal of 85625738431 is 13483752658.

It is a happy number.

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 85625738431 - 2¹⁷ = 85625607359 is a prime.

It is a super-2 number, since 2×85625738431² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85625738411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2518404055 + ... + 2518404088.

It is an arithmetic number, because the mean of its divisors is an integer number (22665636648).

Almost surely, 2^85625738431 is an apocalyptic number.

85625738431 is a deficient number, since it is larger than the sum of its proper divisors (5036808161).

85625738431 is a wasteful number, since it uses less digits than its factorization.

85625738431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5036808160.

The product of its digits is 4838400, while the sum is 52.

The spelling of 85625738431 in words is "eighty-five billion, six hundred twenty-five million, seven hundred thirty-eight thousand, four hundred thirty-one".