65890268525 has 18 divisors (see below), whose sum is σ = 84618487902. Its totient is φ = 50894536000.

The previous prime is 65890268413. The next prime is 65890268537. The reversal of 65890268525 is 52586209856.

It can be written as a sum of positive squares in 9 ways, for example, as 36703279561 + 29186988964 = 191581^2 + 170842^2 .

It is not a de Polignac number, because 65890268525 - 2²⁴ = 65873491309 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1545926 + ... + 1587975.

Almost surely, 2^65890268525 is an apocalyptic number.

It is an amenable number.

65890268525 is a deficient number, since it is larger than the sum of its proper divisors (18728219377).

65890268525 is a wasteful number, since it uses less digits than its factorization.

65890268525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3133969 (or 3133935 counting only the distinct ones).

The product of its (nonzero) digits is 10368000, while the sum is 56.

The spelling of 65890268525 in words is "sixty-five billion, eight hundred ninety million, two hundred sixty-eight thousand, five hundred twenty-five".