265663504500240 has 160 divisors (see below), whose sum is σ = 1026772194087936. Its totient is φ = 55202806126080.

The previous prime is 265663504500223. The next prime is 265663504500259. The reversal of 265663504500240 is 42005405366562.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 265663504500240.

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, 7187846902 + ... + 7187883861.

Almost surely, 2^{265663504500240} is an apocalyptic number.

265663504500240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

265663504500240 is an abundant number, since it is smaller than the sum of its proper divisors (761108689587696).

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

265663504500240 is a wasteful number, since it uses less digits than its factorization.

265663504500240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14375730797 (or 14375730791 counting only the distinct ones).

The product of its (nonzero) digits is 5184000, while the sum is 48.

The spelling of 265663504500240 in words is "two hundred sixty-five trillion, six hundred sixty-three billion, five hundred four million, five hundred thousand, two hundred forty".