265399098560 has 112 divisors (see below), whose sum is σ = 669876601824. Its totient is φ = 99807510528.

The previous prime is 265399098551. The next prime is 265399098581. The reversal of 265399098560 is 65890993562.

It is a Cunningham number, because it is equal to 515169²-1.

It is a junction number, because it is equal to n+sod(n) for n = 265399098493 and 265399098502.

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, 5125922 + ... + 5177438.

Almost surely, 2^265399098560 is an apocalyptic number.

265399098560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 265399098560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (334938300912).

265399098560 is an abundant number, since it is smaller than the sum of its proper divisors (404477503264).

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

265399098560 is a wasteful number, since it uses less digits than its factorization.

265399098560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52498 (or 52488 counting only the distinct ones).

The product of its (nonzero) digits is 31492800, while the sum is 62.

The spelling of 265399098560 in words is "two hundred sixty-five billion, three hundred ninety-nine million, ninety-eight thousand, five hundred sixty".