80917189291 has 2 divisors, whose sum is σ = 80917189292. Its totient is φ = 80917189290.

The previous prime is 80917189289. The next prime is 80917189319. The reversal of 80917189291 is 19298171908.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 80917189291 - 2¹ = 80917189289 is a prime.

Together with 80917189289, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (80917189201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40458594645 + 40458594646.

It is an arithmetic number, because the mean of its divisors is an integer number (40458594646).

Almost surely, 2^80917189291 is an apocalyptic number.

80917189291 is a deficient number, since it is larger than the sum of its proper divisors (1).

80917189291 is an equidigital number, since it uses as much as digits as its factorization.

80917189291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 653184, while the sum is 55.

The spelling of 80917189291 in words is "eighty billion, nine hundred seventeen million, one hundred eighty-nine thousand, two hundred ninety-one".