263912500640 has 48 divisors (see below), whose sum is σ = 623563684128. Its totient is φ = 105553080576.

The previous prime is 263912500639. The next prime is 263912500651. The reversal of 263912500640 is 46005219362.

263912500640 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 263912500594 and 263912500603.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1403219 + ... + 1580141.

It is an arithmetic number, because the mean of its divisors is an integer number (12990910086).

Almost surely, 2^263912500640 is an apocalyptic number.

263912500640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

263912500640 is an abundant number, since it is smaller than the sum of its proper divisors (359651183488).

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

263912500640 is a wasteful number, since it uses less digits than its factorization.

263912500640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186261 (or 186253 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 38.

The spelling of 263912500640 in words is "two hundred sixty-three billion, nine hundred twelve million, five hundred thousand, six hundred forty".