17907792491 has 2 divisors, whose sum is σ = 17907792492. Its totient is φ = 17907792490.

The previous prime is 17907792337. The next prime is 17907792527. The reversal of 17907792491 is 19429770971.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17907792491 is a prime.

It is not a weakly prime, because it can be changed into another prime (17907792191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8953896245 + 8953896246.

It is an arithmetic number, because the mean of its divisors is an integer number (8953896246).

Almost surely, 2^17907792491 is an apocalyptic number.

17907792491 is a deficient number, since it is larger than the sum of its proper divisors (1).

17907792491 is an equidigital number, since it uses as much as digits as its factorization.

17907792491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2000376, while the sum is 56.

The spelling of 17907792491 in words is "seventeen billion, nine hundred seven million, seven hundred ninety-two thousand, four hundred ninety-one".