16005099491 has 2 divisors, whose sum is σ = 16005099492. Its totient is φ = 16005099490.

The previous prime is 16005099437. The next prime is 16005099499. The reversal of 16005099491 is 19499050061.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16005099491 - 2²² = 16000905187 is a prime.

It is not a weakly prime, because it can be changed into another prime (16005099499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8002549745 + 8002549746.

It is an arithmetic number, because the mean of its divisors is an integer number (8002549746).

Almost surely, 2^16005099491 is an apocalyptic number.

16005099491 is a deficient number, since it is larger than the sum of its proper divisors (1).

16005099491 is an equidigital number, since it uses as much as digits as its factorization.

16005099491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87480, while the sum is 44.

The spelling of 16005099491 in words is "sixteen billion, five million, ninety-nine thousand, four hundred ninety-one".