51115651579 has 2 divisors, whose sum is σ = 51115651580. Its totient is φ = 51115651578.

The previous prime is 51115651567. The next prime is 51115651649. The reversal of 51115651579 is 97515651115.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51115651579 - 2⁷ = 51115651451 is a prime.

It is a super-2 number, since 2×51115651579² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51115651519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25557825789 + 25557825790.

It is an arithmetic number, because the mean of its divisors is an integer number (25557825790).

Almost surely, 2^51115651579 is an apocalyptic number.

51115651579 is a deficient number, since it is larger than the sum of its proper divisors (1).

51115651579 is an equidigital number, since it uses as much as digits as its factorization.

51115651579 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 236250, while the sum is 46.

The spelling of 51115651579 in words is "fifty-one billion, one hundred fifteen million, six hundred fifty-one thousand, five hundred seventy-nine".