15091779793 has 2 divisors, whose sum is σ = 15091779794. Its totient is φ = 15091779792.

The previous prime is 15091779779. The next prime is 15091779811. The reversal of 15091779793 is 39797719051.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15091385409 + 394384 = 122847^2 + 628^2 .

It is a cyclic number.

It is not a de Polignac number, because 15091779793 - 2¹⁷ = 15091648721 is a prime.

It is not a weakly prime, because it can be changed into another prime (15091773793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7545889896 + 7545889897.

It is an arithmetic number, because the mean of its divisors is an integer number (7545889897).

Almost surely, 2^15091779793 is an apocalyptic number.

It is an amenable number.

15091779793 is a deficient number, since it is larger than the sum of its proper divisors (1).

15091779793 is an equidigital number, since it uses as much as digits as its factorization.

15091779793 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3750705, while the sum is 58.

The spelling of 15091779793 in words is "fifteen billion, ninety-one million, seven hundred seventy-nine thousand, seven hundred ninety-three".