265266591339920 has 40 divisors (see below), whose sum is σ = 616745571132096. Its totient is φ = 106106508146048.

The previous prime is 265266591339859. The next prime is 265266591339943. The reversal of 265266591339920 is 29933195662562.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×265266591339920² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91721909 + ... + 94569771.

Almost surely, 2^{265266591339920} is an apocalyptic number.

265266591339920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

265266591339920 is an abundant number, since it is smaller than the sum of its proper divisors (351478979792176).

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

265266591339920 is a wasteful number, since it uses less digits than its factorization.

265266591339920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4012199 (or 4012193 counting only the distinct ones).

The product of its (nonzero) digits is 283435200, while the sum is 68.

The spelling of 265266591339920 in words is "two hundred sixty-five trillion, two hundred sixty-six billion, five hundred ninety-one million, three hundred thirty-nine thousand, nine hundred twenty".