263400715664 has 40 divisors (see below), whose sum is σ = 512874673920. Its totient is φ = 131046249600.

The previous prime is 263400715661. The next prime is 263400715703. The reversal of 263400715664 is 466517004362.

It is not an unprimeable number, because it can be changed into a prime (263400715661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26128577 + ... + 26138655.

It is an arithmetic number, because the mean of its divisors is an integer number (12821866848).

Almost surely, 2^263400715664 is an apocalyptic number.

It is an amenable number.

263400715664 is a deficient number, since it is larger than the sum of its proper divisors (249473958256).

263400715664 is a wasteful number, since it uses less digits than its factorization.

263400715664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18039 (or 18033 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 44.

The spelling of 263400715664 in words is "two hundred sixty-three billion, four hundred million, seven hundred fifteen thousand, six hundred sixty-four".