15779642191 has 2 divisors, whose sum is σ = 15779642192. Its totient is φ = 15779642190.

The previous prime is 15779642173. The next prime is 15779642209. The reversal of 15779642191 is 19124697751.

It is a balanced prime because it is at equal distance from previous prime (15779642173) and next prime (15779642209).

It is a cyclic number.

It is not a de Polignac number, because 15779642191 - 2⁵ = 15779642159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15779642171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7889821095 + 7889821096.

It is an arithmetic number, because the mean of its divisors is an integer number (7889821096).

Almost surely, 2^15779642191 is an apocalyptic number.

15779642191 is a deficient number, since it is larger than the sum of its proper divisors (1).

15779642191 is an equidigital number, since it uses as much as digits as its factorization.

15779642191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 952560, while the sum is 52.

The spelling of 15779642191 in words is "fifteen billion, seven hundred seventy-nine million, six hundred forty-two thousand, one hundred ninety-one".