51297732620 has 24 divisors (see below), whose sum is σ = 107729742624. Its totient is φ = 20518235136.

The previous prime is 51297732587. The next prime is 51297732637. The reversal of 51297732620 is 2623779215.

It is a happy 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, 684524 + ... + 755756.

It is an arithmetic number, because the mean of its divisors is an integer number (4488739276).

Almost surely, 2^51297732620 is an apocalyptic number.

It is an amenable number.

51297732620 is an abundant number, since it is smaller than the sum of its proper divisors (56432010004).

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

51297732620 is a wasteful number, since it uses less digits than its factorization.

51297732620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107249 (or 107247 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 44.

The spelling of 51297732620 in words is "fifty-one billion, two hundred ninety-seven million, seven hundred thirty-two thousand, six hundred twenty".