263878765404 has 24 divisors (see below), whose sum is σ = 616183962240. Its totient is φ = 87892896624.

The previous prime is 263878765333. The next prime is 263878765421. The reversal of 263878765404 is 404567878362.

It is a happy number.

It is a super-2 number, since 2×263878765404² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

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, 8319994 + ... + 8351649.

It is an arithmetic number, because the mean of its divisors is an integer number (25674331760).

Almost surely, 2^263878765404 is an apocalyptic number.

It is an amenable number.

263878765404 is an abundant number, since it is smaller than the sum of its proper divisors (352305196836).

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

263878765404 is a wasteful number, since it uses less digits than its factorization.

263878765404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16672969 (or 16672967 counting only the distinct ones).

The product of its (nonzero) digits is 54190080, while the sum is 60.

The spelling of 263878765404 in words is "two hundred sixty-three billion, eight hundred seventy-eight million, seven hundred sixty-five thousand, four hundred four".