15216136591 has 2 divisors, whose sum is σ = 15216136592. Its totient is φ = 15216136590.

The previous prime is 15216136513. The next prime is 15216136597. The reversal of 15216136591 is 19563161251.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15216136591 - 2¹³ = 15216128399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15216136597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7608068295 + 7608068296.

It is an arithmetic number, because the mean of its divisors is an integer number (7608068296).

Almost surely, 2^15216136591 is an apocalyptic number.

15216136591 is a deficient number, since it is larger than the sum of its proper divisors (1).

15216136591 is an equidigital number, since it uses as much as digits as its factorization.

15216136591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48600, while the sum is 40.

The spelling of 15216136591 in words is "fifteen billion, two hundred sixteen million, one hundred thirty-six thousand, five hundred ninety-one".