263763752640 has 56 divisors (see below), whose sum is σ = 837449917680. Its totient is φ = 70337000448.

The previous prime is 263763752621. The next prime is 263763752689. The reversal of 263763752640 is 46257367362.

263763752640 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, 137375995 + ... + 137377914.

Almost surely, 2^263763752640 is an apocalyptic number.

263763752640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

263763752640 is an abundant number, since it is smaller than the sum of its proper divisors (573686165040).

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

263763752640 is a wasteful number, since it uses less digits than its factorization.

263763752640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274753929 (or 274753919 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 51.

The spelling of 263763752640 in words is "two hundred sixty-three billion, seven hundred sixty-three million, seven hundred fifty-two thousand, six hundred forty".