51321599970 has 32 divisors (see below), whose sum is σ = 123183184320. Its totient is φ = 13684499520.

The previous prime is 51321599969. The next prime is 51321600013. The reversal of 51321599970 is 7999512315.

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, 279016 + ... + 424844.

It is an arithmetic number, because the mean of its divisors is an integer number (3849474510).

Almost surely, 2^51321599970 is an apocalyptic number.

51321599970 is an abundant number, since it is smaller than the sum of its proper divisors (71861584350).

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

51321599970 is a wasteful number, since it uses less digits than its factorization.

51321599970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157570.

The product of its (nonzero) digits is 765450, while the sum is 51.

The spelling of 51321599970 in words is "fifty-one billion, three hundred twenty-one million, five hundred ninety-nine thousand, nine hundred seventy".