51506496839 has 8 divisors (see below), whose sum is σ = 58933583520. Its totient is φ = 44096664096.

The previous prime is 51506496799. The next prime is 51506496841. The reversal of 51506496839 is 93869460515.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51506496839 - 2²⁴ = 51489719623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51506496889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4307084 + ... + 4319025.

It is an arithmetic number, because the mean of its divisors is an integer number (7366697940).

Almost surely, 2^51506496839 is an apocalyptic number.

51506496839 is a deficient number, since it is larger than the sum of its proper divisors (7427086681).

51506496839 is an equidigital number, since it uses as much as digits as its factorization.

51506496839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8626969.

The product of its (nonzero) digits is 6998400, while the sum is 56.

The spelling of 51506496839 in words is "fifty-one billion, five hundred six million, four hundred ninety-six thousand, eight hundred thirty-nine".