17115621071 has 2 divisors, whose sum is σ = 17115621072. Its totient is φ = 17115621070.

The previous prime is 17115621043. The next prime is 17115621073. The reversal of 17115621071 is 17012651171.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 17115621071 - 2¹⁴ = 17115604687 is a prime.

Together with 17115621073, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17115621073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8557810535 + 8557810536.

It is an arithmetic number, because the mean of its divisors is an integer number (8557810536).

Almost surely, 2^17115621071 is an apocalyptic number.

17115621071 is a deficient number, since it is larger than the sum of its proper divisors (1).

17115621071 is an equidigital number, since it uses as much as digits as its factorization.

17115621071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2940, while the sum is 32.

The spelling of 17115621071 in words is "seventeen billion, one hundred fifteen million, six hundred twenty-one thousand, seventy-one".