51021120937836 has 192 divisors, whose sum is σ = 144232704387072. Its totient is φ = 13703492210688.

The previous prime is 51021120937789. The next prime is 51021120937877. The reversal of 51021120937836 is 63873902112015.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6823738530 + ... + 6823746006.

It is an arithmetic number, because the mean of its divisors is an integer number (751212002016).

Almost surely, 2^{51021120937836} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51021120937836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72116352193536).

51021120937836 is an abundant number, since it is smaller than the sum of its proper divisors (93211583449236).

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

51021120937836 is a wasteful number, since it uses less digits than its factorization.

51021120937836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12608 (or 12606 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 48.

The spelling of 51021120937836 in words is "fifty-one trillion, twenty-one billion, one hundred twenty million, nine hundred thirty-seven thousand, eight hundred thirty-six".