51099694752 has 96 divisors (see below), whose sum is σ = 136879823808. Its totient is φ = 16685899776.

The previous prime is 51099694703. The next prime is 51099694823. The reversal of 51099694752 is 25749699015.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×51099694752² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51099694692 and 51099694701.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3416763 + ... + 3431685.

It is an arithmetic number, because the mean of its divisors is an integer number (1425831498).

Almost surely, 2^51099694752 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 51099694752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68439911904).

51099694752 is an abundant number, since it is smaller than the sum of its proper divisors (85780129056).

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

51099694752 is a wasteful number, since it uses less digits than its factorization.

51099694752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15662 (or 15654 counting only the distinct ones).

The product of its (nonzero) digits is 6123600, while the sum is 57.

The spelling of 51099694752 in words is "fifty-one billion, ninety-nine million, six hundred ninety-four thousand, seven hundred fifty-two".