23645157779 has 2 divisors, whose sum is σ = 23645157780. Its totient is φ = 23645157778.

The previous prime is 23645157763. The next prime is 23645157787. The reversal of 23645157779 is 97775154632.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23645157779 - 2⁴ = 23645157763 is a prime.

It is not a weakly prime, because it can be changed into another prime (23645157719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11822578889 + 11822578890.

It is an arithmetic number, because the mean of its divisors is an integer number (11822578890).

Almost surely, 2^23645157779 is an apocalyptic number.

23645157779 is a deficient number, since it is larger than the sum of its proper divisors (1).

23645157779 is an equidigital number, since it uses as much as digits as its factorization.

23645157779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11113200, while the sum is 56.

The spelling of 23645157779 in words is "twenty-three billion, six hundred forty-five million, one hundred fifty-seven thousand, seven hundred seventy-nine".