15157945391 has 2 divisors, whose sum is σ = 15157945392. Its totient is φ = 15157945390.

The previous prime is 15157945321. The next prime is 15157945393. The reversal of 15157945391 is 19354975151.

It is a strong prime.

It is an emirp because it is prime and its reverse (19354975151) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15157945391 - 2¹⁰ = 15157944367 is a prime.

It is a Sophie Germain prime.

Together with 15157945393, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15157945393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7578972695 + 7578972696.

It is an arithmetic number, because the mean of its divisors is an integer number (7578972696).

Almost surely, 2^15157945391 is an apocalyptic number.

15157945391 is a deficient number, since it is larger than the sum of its proper divisors (1).

15157945391 is an equidigital number, since it uses as much as digits as its factorization.

15157945391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 850500, while the sum is 50.

The spelling of 15157945391 in words is "fifteen billion, one hundred fifty-seven million, nine hundred forty-five thousand, three hundred ninety-one".