85867036431 has 32 divisors (see below), whose sum is σ = 136510396416. Its totient is φ = 47399424000.

The previous prime is 85867036403. The next prime is 85867036459. The reversal of 85867036431 is 13463076858.

It is an interprime number because it is at equal distance from previous prime (85867036403) and next prime (85867036459).

It is not a de Polignac number, because 85867036431 - 2⁵ = 85867036399 is a prime.

It is a super-2 number, since 2×85867036431² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85867236431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2451330 + ... + 2486111.

It is an arithmetic number, because the mean of its divisors is an integer number (4265949888).

Almost surely, 2^85867036431 is an apocalyptic number.

85867036431 is a deficient number, since it is larger than the sum of its proper divisors (50643359985).

85867036431 is a wasteful number, since it uses less digits than its factorization.

85867036431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4937503.

The product of its (nonzero) digits is 2903040, while the sum is 51.

The spelling of 85867036431 in words is "eighty-five billion, eight hundred sixty-seven million, thirty-six thousand, four hundred thirty-one".