109638663779 has 2 divisors, whose sum is σ = 109638663780. Its totient is φ = 109638663778.

The previous prime is 109638663731. The next prime is 109638663793. The reversal of 109638663779 is 977366836901.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-109638663779 is a prime.

It is not a weakly prime, because it can be changed into another prime (109638669779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54819331889 + 54819331890.

It is an arithmetic number, because the mean of its divisors is an integer number (54819331890).

Almost surely, 2^109638663779 is an apocalyptic number.

109638663779 is a deficient number, since it is larger than the sum of its proper divisors (1).

109638663779 is an equidigital number, since it uses as much as digits as its factorization.

109638663779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 61725888, while the sum is 65.

The spelling of 109638663779 in words is "one hundred nine billion, six hundred thirty-eight million, six hundred sixty-three thousand, seven hundred seventy-nine".