51310463647 has 4 divisors (see below), whose sum is σ = 51311081016. Its totient is φ = 51309846280.

The previous prime is 51310463641. The next prime is 51310463653. The reversal of 51310463647 is 74636401315.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (51310463641) and next prime (51310463653).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51310463647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51310463641) 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, 160213 + ... + 358174.

It is an arithmetic number, because the mean of its divisors is an integer number (12827770254).

Almost surely, 2^51310463647 is an apocalyptic number.

51310463647 is a deficient number, since it is larger than the sum of its proper divisors (617369).

51310463647 is an equidigital number, since it uses as much as digits as its factorization.

51310463647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617368.

The product of its (nonzero) digits is 181440, while the sum is 40.

The spelling of 51310463647 in words is "fifty-one billion, three hundred ten million, four hundred sixty-three thousand, six hundred forty-seven".