85621635025 has 12 divisors (see below), whose sum is σ = 106174731292. Its totient is φ = 68494789440.

The previous prime is 85621635023. The next prime is 85621635031. The reversal of 85621635025 is 52053612658.

It can be written as a sum of positive squares in 6 ways, for example, as 4307690689 + 81313944336 = 65633^2 + 285156^2 .

It is not a de Polignac number, because 85621635025 - 2¹ = 85621635023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85621635023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 950227 + ... + 1036423.

Almost surely, 2^85621635025 is an apocalyptic number.

It is an amenable number.

85621635025 is a deficient number, since it is larger than the sum of its proper divisors (20553096267).

85621635025 is a wasteful number, since it uses less digits than its factorization.

85621635025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125940 (or 125935 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 43.

The spelling of 85621635025 in words is "eighty-five billion, six hundred twenty-one million, six hundred thirty-five thousand, twenty-five".