265531145660 has 48 divisors (see below), whose sum is σ = 634755889152. Its totient is φ = 92358657600.

The previous prime is 265531145653. The next prime is 265531145707. The reversal of 265531145660 is 66541135562.

It is a Harshad number since it is a multiple of its sum of digits (44).

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, 26233196 + ... + 26243315.

It is an arithmetic number, because the mean of its divisors is an integer number (13224081024).

Almost surely, 2^265531145660 is an apocalyptic number.

265531145660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

265531145660 is an abundant number, since it is smaller than the sum of its proper divisors (369224743492).

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

265531145660 is a wasteful number, since it uses less digits than its factorization.

265531145660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52476554 (or 52476552 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 44.

The spelling of 265531145660 in words is "two hundred sixty-five billion, five hundred thirty-one million, one hundred forty-five thousand, six hundred sixty".