51005095979 has 2 divisors, whose sum is σ = 51005095980. Its totient is φ = 51005095978.

The previous prime is 51005095961. The next prime is 51005095993. The reversal of 51005095979 is 97959050015.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51005095979 is a prime.

It is not a weakly prime, because it can be changed into another prime (51005095949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25502547989 + 25502547990.

It is an arithmetic number, because the mean of its divisors is an integer number (25502547990).

Almost surely, 2^51005095979 is an apocalyptic number.

51005095979 is a deficient number, since it is larger than the sum of its proper divisors (1).

51005095979 is an equidigital number, since it uses as much as digits as its factorization.

51005095979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 637875, while the sum is 50.

The spelling of 51005095979 in words is "fifty-one billion, five million, ninety-five thousand, nine hundred seventy-nine".