15951610091 has 2 divisors, whose sum is σ = 15951610092. Its totient is φ = 15951610090.

The previous prime is 15951610063. The next prime is 15951610097. The reversal of 15951610091 is 19001615951.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15951610091 - 2³⁰ = 14877868267 is a prime.

It is not a weakly prime, because it can be changed into another prime (15951610097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7975805045 + 7975805046.

It is an arithmetic number, because the mean of its divisors is an integer number (7975805046).

Almost surely, 2^15951610091 is an apocalyptic number.

15951610091 is a deficient number, since it is larger than the sum of its proper divisors (1).

15951610091 is an equidigital number, since it uses as much as digits as its factorization.

15951610091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12150, while the sum is 38.

The spelling of 15951610091 in words is "fifteen billion, nine hundred fifty-one million, six hundred ten thousand, ninety-one".