80591851 has 2 divisors, whose sum is σ = 80591852. Its totient is φ = 80591850.

The previous prime is 80591837. The next prime is 80591873. The reversal of 80591851 is 15819508.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80591851 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80591851.

It is not a weakly prime, because it can be changed into another prime (80591831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40295925 + 40295926.

It is an arithmetic number, because the mean of its divisors is an integer number (40295926).

Almost surely, 2^80591851 is an apocalyptic number.

80591851 is a deficient number, since it is larger than the sum of its proper divisors (1).

80591851 is an equidigital number, since it uses as much as digits as its factorization.

80591851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 37.

The square root of 80591851 is about 8977.2964193013. The cubic root of 80591851 is about 431.9469152736.

The spelling of 80591851 in words is "eighty million, five hundred ninety-one thousand, eight hundred fifty-one".