85437836565 has 16 divisors (see below), whose sum is σ = 136749375168. Its totient is φ = 45550567296.

The previous prime is 85437836557. The next prime is 85437836573. The reversal of 85437836565 is 56563873458.

It is an interprime number because it is at equal distance from previous prime (85437836557) and next prime (85437836573).

It is not a de Polignac number, because 85437836565 - 2³ = 85437836557 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 85437836499 and 85437836508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 973984 + ... + 1058073.

It is an arithmetic number, because the mean of its divisors is an integer number (8546835948).

Almost surely, 2^85437836565 is an apocalyptic number.

It is an amenable number.

85437836565 is a deficient number, since it is larger than the sum of its proper divisors (51311538603).

85437836565 is a wasteful number, since it uses less digits than its factorization.

85437836565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2034868.

The product of its digits is 72576000, while the sum is 60.

The spelling of 85437836565 in words is "eighty-five billion, four hundred thirty-seven million, eight hundred thirty-six thousand, five hundred sixty-five".