51280203720 has 64 divisors (see below), whose sum is σ = 158803223040. Its totient is φ = 13233600000.

The previous prime is 51280203719. The next prime is 51280203743. The reversal of 51280203720 is 2730208215.

It is a Harshad number since it is a multiple of its sum of digits (30).

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 15 ways as a sum of consecutive naturals, for example, 6888781 + ... + 6896220.

It is an arithmetic number, because the mean of its divisors is an integer number (2481300360).

Almost surely, 2^51280203720 is an apocalyptic number.

It is an amenable number.

51280203720 is an abundant number, since it is smaller than the sum of its proper divisors (107523019320).

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

51280203720 is a wasteful number, since it uses less digits than its factorization.

51280203720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13785046 (or 13785042 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The spelling of 51280203720 in words is "fifty-one billion, two hundred eighty million, two hundred three thousand, seven hundred twenty".