51507091679 has 2 divisors, whose sum is σ = 51507091680. Its totient is φ = 51507091678.

The previous prime is 51507091639. The next prime is 51507091717. The reversal of 51507091679 is 97619070515.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51507091679 is a prime.

It is a super-2 number, since 2×51507091679² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51507091619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25753545839 + 25753545840.

It is an arithmetic number, because the mean of its divisors is an integer number (25753545840).

Almost surely, 2^51507091679 is an apocalyptic number.

51507091679 is a deficient number, since it is larger than the sum of its proper divisors (1).

51507091679 is an equidigital number, since it uses as much as digits as its factorization.

51507091679 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 595350, while the sum is 50.

The spelling of 51507091679 in words is "fifty-one billion, five hundred seven million, ninety-one thousand, six hundred seventy-nine".