51511374646120 has 128 divisors (see below), whose sum is σ = 120895964259840. Its totient is φ = 19735634257920.

The previous prime is 51511374646091. The next prime is 51511374646183. The reversal of 51511374646120 is 2164647311515.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33771889 + ... + 35264191.

It is an arithmetic number, because the mean of its divisors is an integer number (944499720780).

Almost surely, 2^{51511374646120} 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 51511374646120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60447982129920).

51511374646120 is an abundant number, since it is smaller than the sum of its proper divisors (69384589613720).

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

51511374646120 is a wasteful number, since it uses less digits than its factorization.

51511374646120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1492715 (or 1492711 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 46.

The spelling of 51511374646120 in words is "fifty-one trillion, five hundred eleven billion, three hundred seventy-four million, six hundred forty-six thousand, one hundred twenty".