16518916979 has 2 divisors, whose sum is σ = 16518916980. Its totient is φ = 16518916978.

The previous prime is 16518916969. The next prime is 16518917011. The reversal of 16518916979 is 97961981561.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16518916979 is a prime.

It is not a weakly prime, because it can be changed into another prime (16518916969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8259458489 + 8259458490.

It is an arithmetic number, because the mean of its divisors is an integer number (8259458490).

Almost surely, 2^16518916979 is an apocalyptic number.

16518916979 is a deficient number, since it is larger than the sum of its proper divisors (1).

16518916979 is an equidigital number, since it uses as much as digits as its factorization.

16518916979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7348320, while the sum is 62.

The spelling of 16518916979 in words is "sixteen billion, five hundred eighteen million, nine hundred sixteen thousand, nine hundred seventy-nine".