15814724979971 has 2 divisors, whose sum is σ = 15814724979972. Its totient is φ = 15814724979970.

The previous prime is 15814724979943. The next prime is 15814724979997. The reversal of 15814724979971 is 17997942741851.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15814724979971 is a prime.

It is not a weakly prime, because it can be changed into another prime (15814724976971) 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, 7907362489985 + 7907362489986.

It is an arithmetic number, because the mean of its divisors is an integer number (7907362489986).

Almost surely, 2^{15814724979971} is an apocalyptic number.

15814724979971 is a deficient number, since it is larger than the sum of its proper divisors (1).

15814724979971 is an equidigital number, since it uses as much as digits as its factorization.

15814724979971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 320060160, while the sum is 74.

The spelling of 15814724979971 in words is "fifteen trillion, eight hundred fourteen billion, seven hundred twenty-four million, nine hundred seventy-nine thousand, nine hundred seventy-one".