15691858379 has 2 divisors, whose sum is σ = 15691858380. Its totient is φ = 15691858378.

The previous prime is 15691858361. The next prime is 15691858393. The reversal of 15691858379 is 97385819651.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15691858379 - 2²⁸ = 15423422923 is a prime.

It is not a weakly prime, because it can be changed into another prime (15691858579) 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, 7845929189 + 7845929190.

It is an arithmetic number, because the mean of its divisors is an integer number (7845929190).

Almost surely, 2^15691858379 is an apocalyptic number.

15691858379 is a deficient number, since it is larger than the sum of its proper divisors (1).

15691858379 is an equidigital number, since it uses as much as digits as its factorization.

15691858379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16329600, while the sum is 62.

The spelling of 15691858379 in words is "fifteen billion, six hundred ninety-one million, eight hundred fifty-eight thousand, three hundred seventy-nine".