265999896252 has 72 divisors (see below), whose sum is σ = 686043146880. Its totient is φ = 86881364640.

The previous prime is 265999896193. The next prime is 265999896269. The reversal of 265999896252 is 252698999562.

265999896252 is a `hidden beast` number, since 2 + 6 + 599 + 9 + 8 + 9 + 6 + 25 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 97399 + ... + 735857.

It is an arithmetic number, because the mean of its divisors is an integer number (9528377040).

Almost surely, 2^265999896252 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 265999896252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (343021573440).

265999896252 is an abundant number, since it is smaller than the sum of its proper divisors (420043250628).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

265999896252 is a wasteful number, since it uses less digits than its factorization.

265999896252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638703 (or 638698 counting only the distinct ones).

The product of its digits is 377913600, while the sum is 72.

The spelling of 265999896252 in words is "two hundred sixty-five billion, nine hundred ninety-nine million, eight hundred ninety-six thousand, two hundred fifty-two".