51001656111616 has 160 divisors (see below), whose sum is σ = 117090697680000. Its totient is φ = 21740021415936.

The previous prime is 51001656111611. The next prime is 51001656111647. The reversal of 51001656111616 is 61611165610015.

It is a super-2 number, since 2×51001656111616² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51001656111611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 558882760 + ... + 558974008.

It is an arithmetic number, because the mean of its divisors is an integer number (731816860500).

Almost surely, 2^{51001656111616} is an apocalyptic number.

51001656111616 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51001656111616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58545348840000).

51001656111616 is an abundant number, since it is smaller than the sum of its proper divisors (66089041568384).

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

51001656111616 is an equidigital number, since it uses as much as digits as its factorization.

51001656111616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92114 (or 92098 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 40.

The spelling of 51001656111616 in words is "fifty-one trillion, one billion, six hundred fifty-six million, one hundred eleven thousand, six hundred sixteen".