51172129079 has 8 divisors (see below), whose sum is σ = 51846791040. Its totient is φ = 50501104696.

The previous prime is 51172129027. The next prime is 51172129081. The reversal of 51172129079 is 97092127115.

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 51172129079 - 2³² = 46877161783 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 (51172129279) 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, 881069 + ... + 937350.

It is an arithmetic number, because the mean of its divisors is an integer number (6480848880).

Almost surely, 2^51172129079 is an apocalyptic number.

51172129079 is a deficient number, since it is larger than the sum of its proper divisors (674661961).

51172129079 is a wasteful number, since it uses less digits than its factorization.

51172129079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1818789.

The product of its (nonzero) digits is 79380, while the sum is 44.

The spelling of 51172129079 in words is "fifty-one billion, one hundred seventy-two million, one hundred twenty-nine thousand, seventy-nine".