265865631168 has 112 divisors (see below), whose sum is σ = 709485739776. Its totient is φ = 87862978560.

The previous prime is 265865631071. The next prime is 265865631193. The reversal of 265865631168 is 861136568562.

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, 10642180 + ... + 10667132.

Almost surely, 2^265865631168 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 265865631168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (354742869888).

265865631168 is an abundant number, since it is smaller than the sum of its proper divisors (443620108608).

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

265865631168 is a wasteful number, since it uses less digits than its factorization.

265865631168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25442 (or 25432 counting only the distinct ones).

The product of its digits is 12441600, while the sum is 57.

The spelling of 265865631168 in words is "two hundred sixty-five billion, eight hundred sixty-five million, six hundred thirty-one thousand, one hundred sixty-eight".