80156191 has 2 divisors, whose sum is σ = 80156192. Its totient is φ = 80156190.

The previous prime is 80156143. The next prime is 80156201. The reversal of 80156191 is 19165108.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 80156191 - 2¹¹ = 80154143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80156101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40078095 + 40078096.

It is an arithmetic number, because the mean of its divisors is an integer number (40078096).

Almost surely, 2^80156191 is an apocalyptic number.

80156191 is a deficient number, since it is larger than the sum of its proper divisors (1).

80156191 is an equidigital number, since it uses as much as digits as its factorization.

80156191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 31.

The square root of 80156191 is about 8952.9989947503. The cubic root of 80156191 is about 431.1671751322.

The spelling of 80156191 in words is "eighty million, one hundred fifty-six thousand, one hundred ninety-one".