15691955093 has 2 divisors, whose sum is σ = 15691955094. Its totient is φ = 15691955092.

The previous prime is 15691954933. The next prime is 15691955099. The reversal of 15691955093 is 39055919651.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14924775889 + 767179204 = 122167^2 + 27698^2 .

It is a cyclic number.

It is not a de Polignac number, because 15691955093 - 2²⁴ = 15675177877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15691955099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7845977546 + 7845977547.

It is an arithmetic number, because the mean of its divisors is an integer number (7845977547).

Almost surely, 2^15691955093 is an apocalyptic number.

It is an amenable number.

15691955093 is a deficient number, since it is larger than the sum of its proper divisors (1).

15691955093 is an equidigital number, since it uses as much as digits as its factorization.

15691955093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1640250, while the sum is 53.

The spelling of 15691955093 in words is "fifteen billion, six hundred ninety-one million, nine hundred fifty-five thousand, ninety-three".