51507247616 has 40 divisors (see below), whose sum is σ = 112269716064. Its totient is φ = 23412382720.

The previous prime is 51507247613. The next prime is 51507247619. The reversal of 51507247616 is 61674270515.

It is an interprime number because it is at equal distance from previous prime (51507247613) and next prime (51507247619).

It is a Harshad number since it is a multiple of its sum of digits (44).

It is not an unprimeable number, because it can be changed into a prime (51507247613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4567100 + ... + 4578363.

Almost surely, 2^51507247616 is an apocalyptic number.

It is an amenable number.

51507247616 is an abundant number, since it is smaller than the sum of its proper divisors (60762468448).

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

51507247616 is an equidigital number, since it uses as much as digits as its factorization.

51507247616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9145492 (or 9145476 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 44.

The spelling of 51507247616 in words is "fifty-one billion, five hundred seven million, two hundred forty-seven thousand, six hundred sixteen".