51280256500 has 48 divisors (see below), whose sum is σ = 122177555136. Its totient is φ = 18647364000.

The previous prime is 51280256471. The next prime is 51280256527. The reversal of 51280256500 is 565208215.

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, 4656342 + ... + 4667341.

It is an arithmetic number, because the mean of its divisors is an integer number (2545365732).

Almost surely, 2^51280256500 is an apocalyptic number.

51280256500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51280256500 is an abundant number, since it is smaller than the sum of its proper divisors (70897298636).

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

51280256500 is a wasteful number, since it uses less digits than its factorization.

51280256500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9323713 (or 9323701 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 34.

The spelling of 51280256500 in words is "fifty-one billion, two hundred eighty million, two hundred fifty-six thousand, five hundred".