251367802040 has 32 divisors (see below), whose sum is σ = 574849323360. Its totient is φ = 98898806400.

The previous prime is 251367802031. The next prime is 251367802051. The reversal of 251367802040 is 40208763152.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 251367801985 and 251367802003.

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, 51507356 + ... + 51512235.

It is an arithmetic number, because the mean of its divisors is an integer number (17964041355).

Almost surely, 2^251367802040 is an apocalyptic number.

251367802040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

251367802040 is an abundant number, since it is smaller than the sum of its proper divisors (323481521320).

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

251367802040 is a wasteful number, since it uses less digits than its factorization.

251367802040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103019663 (or 103019659 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 38.

The spelling of 251367802040 in words is "two hundred fifty-one billion, three hundred sixty-seven million, eight hundred two thousand, forty".