17972056499 has 2 divisors, whose sum is σ = 17972056500. Its totient is φ = 17972056498.

The previous prime is 17972056469. The next prime is 17972056519. The reversal of 17972056499 is 99465027971.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17972056499 is a prime.

It is not a weakly prime, because it can be changed into another prime (17972056469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8986028249 + 8986028250.

It is an arithmetic number, because the mean of its divisors is an integer number (8986028250).

Almost surely, 2^17972056499 is an apocalyptic number.

17972056499 is a deficient number, since it is larger than the sum of its proper divisors (1).

17972056499 is an equidigital number, since it uses as much as digits as its factorization.

17972056499 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8573040, while the sum is 59.

The spelling of 17972056499 in words is "seventeen billion, nine hundred seventy-two million, fifty-six thousand, four hundred ninety-nine".