80858740091 has 2 divisors, whose sum is σ = 80858740092. Its totient is φ = 80858740090.

The previous prime is 80858740087. The next prime is 80858740117. The reversal of 80858740091 is 19004785808.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 80858740091 - 2² = 80858740087 is a prime.

It is not a weakly prime, because it can be changed into another prime (80858745091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40429370045 + 40429370046.

It is an arithmetic number, because the mean of its divisors is an integer number (40429370046).

Almost surely, 2^80858740091 is an apocalyptic number.

80858740091 is a deficient number, since it is larger than the sum of its proper divisors (1).

80858740091 is an equidigital number, since it uses as much as digits as its factorization.

80858740091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 645120, while the sum is 50.

The spelling of 80858740091 in words is "eighty billion, eight hundred fifty-eight million, seven hundred forty thousand, ninety-one".