15045312991 has 2 divisors, whose sum is σ = 15045312992. Its totient is φ = 15045312990.

The previous prime is 15045312967. The next prime is 15045313009. The reversal of 15045312991 is 19921354051.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15045312991 - 2¹⁵ = 15045280223 is a prime.

It is a super-2 number, since 2×15045312991² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15045312941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7522656495 + 7522656496.

It is an arithmetic number, because the mean of its divisors is an integer number (7522656496).

Almost surely, 2^15045312991 is an apocalyptic number.

15045312991 is a deficient number, since it is larger than the sum of its proper divisors (1).

15045312991 is an equidigital number, since it uses as much as digits as its factorization.

15045312991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48600, while the sum is 40.

The spelling of 15045312991 in words is "fifteen billion, forty-five million, three hundred twelve thousand, nine hundred ninety-one".