51365623979 has 2 divisors, whose sum is σ = 51365623980. Its totient is φ = 51365623978.

The previous prime is 51365623973. The next prime is 51365623993. The reversal of 51365623979 is 97932656315.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51365623979 - 2⁴ = 51365623963 is a prime.

It is not a weakly prime, because it can be changed into another prime (51365623973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25682811989 + 25682811990.

It is an arithmetic number, because the mean of its divisors is an integer number (25682811990).

Almost surely, 2^51365623979 is an apocalyptic number.

51365623979 is a deficient number, since it is larger than the sum of its proper divisors (1).

51365623979 is an equidigital number, since it uses as much as digits as its factorization.

51365623979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9185400, while the sum is 56.

The spelling of 51365623979 in words is "fifty-one billion, three hundred sixty-five million, six hundred twenty-three thousand, nine hundred seventy-nine".