51507091716 has 96 divisors (see below), whose sum is σ = 128836915200. Its totient is φ = 15968010240.

The previous prime is 51507091679. The next prime is 51507091717. The reversal of 51507091716 is 61719070515.

It is not an unprimeable number, because it can be changed into a prime (51507091717) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3862276 + ... + 3875588.

It is an arithmetic number, because the mean of its divisors is an integer number (1342051200).

Almost surely, 2^51507091716 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 51507091716, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64418457600).

51507091716 is an abundant number, since it is smaller than the sum of its proper divisors (77329823484).

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

51507091716 is a wasteful number, since it uses less digits than its factorization.

51507091716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13649 (or 13647 counting only the distinct ones).

The product of its (nonzero) digits is 66150, while the sum is 42.

The spelling of 51507091716 in words is "fifty-one billion, five hundred seven million, ninety-one thousand, seven hundred sixteen".