15291994793 has 2 divisors, whose sum is σ = 15291994794. Its totient is φ = 15291994792.

The previous prime is 15291994771. The next prime is 15291994811. The reversal of 15291994793 is 39749919251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10568456809 + 4723537984 = 102803^2 + 68728^2 .

It is a cyclic number.

It is not a de Polignac number, because 15291994793 - 2²⁴ = 15275217577 is a prime.

It is a super-2 number, since 2×15291994793² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15291994723) 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, 7645997396 + 7645997397.

It is an arithmetic number, because the mean of its divisors is an integer number (7645997397).

Almost surely, 2^15291994793 is an apocalyptic number.

It is an amenable number.

15291994793 is a deficient number, since it is larger than the sum of its proper divisors (1).

15291994793 is an equidigital number, since it uses as much as digits as its factorization.

15291994793 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5511240, while the sum is 59.

The spelling of 15291994793 in words is "fifteen billion, two hundred ninety-one million, nine hundred ninety-four thousand, seven hundred ninety-three".