265165415500 has 96 divisors (see below), whose sum is σ = 609835262400. Its totient is φ = 100445184000.

The previous prime is 265165415479. The next prime is 265165415509. The reversal of 265165415500 is 5514561562.

It is not an unprimeable number, because it can be changed into a prime (265165415509) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42566386 + ... + 42572614.

It is an arithmetic number, because the mean of its divisors is an integer number (6352450650).

Almost surely, 2^265165415500 is an apocalyptic number.

265165415500 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 265165415500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (304917631200).

265165415500 is an abundant number, since it is smaller than the sum of its proper divisors (344669846900).

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

265165415500 is a wasteful number, since it uses less digits than its factorization.

265165415500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10748 (or 10736 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 40.

The spelling of 265165415500 in words is "two hundred sixty-five billion, one hundred sixty-five million, four hundred fifteen thousand, five hundred".