263927638040 has 64 divisors (see below), whose sum is σ = 648849726720. Its totient is φ = 95821488000.

The previous prime is 263927638033. The next prime is 263927638097. The reversal of 263927638040 is 40836729362.

It is a super-3 number, since 3×263927638040³ (a number of 35 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 263927638040.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 197666 + ... + 752945.

It is an arithmetic number, because the mean of its divisors is an integer number (10138276980).

Almost surely, 2^263927638040 is an apocalyptic number.

263927638040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

263927638040 is an abundant number, since it is smaller than the sum of its proper divisors (384922088680).

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

263927638040 is a wasteful number, since it uses less digits than its factorization.

263927638040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 951264 (or 951260 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 50.

The spelling of 263927638040 in words is "two hundred sixty-three billion, nine hundred twenty-seven million, six hundred thirty-eight thousand, forty".