80695157 has 4 divisors (see below), whose sum is σ = 80750700. Its totient is φ = 80639616.

The previous prime is 80695151. The next prime is 80695159. The reversal of 80695157 is 75159608.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 75881521 + 4813636 = 8711^2 + 2194^2 .

It is a cyclic number.

It is not a de Polignac number, because 80695157 - 2¹⁸ = 80433013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80695151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25532 + ... + 28517.

It is an arithmetic number, because the mean of its divisors is an integer number (20187675).

Almost surely, 2^80695157 is an apocalyptic number.

It is an amenable number.

80695157 is a deficient number, since it is larger than the sum of its proper divisors (55543).

80695157 is a wasteful number, since it uses less digits than its factorization.

80695157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55542.

The product of its (nonzero) digits is 75600, while the sum is 41.

The square root of 80695157 is about 8983.0483133511. The cubic root of 80695157 is about 432.1313990008.

The spelling of 80695157 in words is "eighty million, six hundred ninety-five thousand, one hundred fifty-seven".