16312591187 has 2 divisors, whose sum is σ = 16312591188. Its totient is φ = 16312591186.

The previous prime is 16312591133. The next prime is 16312591199. The reversal of 16312591187 is 78119521361.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16312591187 - 2⁶ = 16312591123 is a prime.

It is a super-2 number, since 2×16312591187² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16312591387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8156295593 + 8156295594.

It is an arithmetic number, because the mean of its divisors is an integer number (8156295594).

Almost surely, 2^16312591187 is an apocalyptic number.

16312591187 is a deficient number, since it is larger than the sum of its proper divisors (1).

16312591187 is an equidigital number, since it uses as much as digits as its factorization.

16312591187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 44.

The spelling of 16312591187 in words is "sixteen billion, three hundred twelve million, five hundred ninety-one thousand, one hundred eighty-seven".