15151111551091 has 2 divisors, whose sum is σ = 15151111551092. Its totient is φ = 15151111551090.

The previous prime is 15151111551083. The next prime is 15151111551223. The reversal of 15151111551091 is 19015511115151.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15151111551091 - 2³ = 15151111551083 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15151111551091.

It is not a weakly prime, because it can be changed into another prime (15151111551691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7575555775545 + 7575555775546.

It is an arithmetic number, because the mean of its divisors is an integer number (7575555775546).

Almost surely, 2^{15151111551091} is an apocalyptic number.

15151111551091 is a deficient number, since it is larger than the sum of its proper divisors (1).

15151111551091 is an equidigital number, since it uses as much as digits as its factorization.

15151111551091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5625, while the sum is 37.

The spelling of 15151111551091 in words is "fifteen trillion, one hundred fifty-one billion, one hundred eleven million, five hundred fifty-one thousand, ninety-one".