51107621016 has 128 divisors (see below), whose sum is σ = 140888678400. Its totient is φ = 15378800640.

The previous prime is 51107621009. The next prime is 51107621021. The reversal of 51107621016 is 61012670115.

It is a super-2 number, since 2×51107621016² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

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, 1411345 + ... + 1447103.

It is an arithmetic number, because the mean of its divisors is an integer number (1100692800).

Almost surely, 2^51107621016 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 51107621016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70444339200).

51107621016 is an abundant number, since it is smaller than the sum of its proper divisors (89781057384).

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

51107621016 is a wasteful number, since it uses less digits than its factorization.

51107621016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35929 (or 35925 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 30.

The spelling of 51107621016 in words is "fifty-one billion, one hundred seven million, six hundred twenty-one thousand, sixteen".