16351662491 has 2 divisors, whose sum is σ = 16351662492. Its totient is φ = 16351662490.

The previous prime is 16351662479. The next prime is 16351662533. The reversal of 16351662491 is 19426615361.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16351662491 - 2¹⁰ = 16351661467 is a prime.

It is not a weakly prime, because it can be changed into another prime (16351262491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8175831245 + 8175831246.

It is an arithmetic number, because the mean of its divisors is an integer number (8175831246).

Almost surely, 2^16351662491 is an apocalyptic number.

16351662491 is a deficient number, since it is larger than the sum of its proper divisors (1).

16351662491 is an equidigital number, since it uses as much as digits as its factorization.

16351662491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 44.

The spelling of 16351662491 in words is "sixteen billion, three hundred fifty-one million, six hundred sixty-two thousand, four hundred ninety-one".