265951553496 has 128 divisors (see below), whose sum is σ = 741666240000. Its totient is φ = 79110743040.

The previous prime is 265951553471. The next prime is 265951553597. The reversal of 265951553496 is 694355159562.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 296925 + ... + 787443.

It is an arithmetic number, because the mean of its divisors is an integer number (5794267500).

Almost surely, 2^265951553496 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 265951553496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (370833120000).

265951553496 is an abundant number, since it is smaller than the sum of its proper divisors (475714686504).

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

265951553496 is a wasteful number, since it uses less digits than its factorization.

265951553496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490617 (or 490613 counting only the distinct ones).

The product of its digits is 43740000, while the sum is 60.

The spelling of 265951553496 in words is "two hundred sixty-five billion, nine hundred fifty-one million, five hundred fifty-three thousand, four hundred ninety-six".