80908061887 has 4 divisors (see below), whose sum is σ = 80914438800. Its totient is φ = 80901684976.

The previous prime is 80908061867. The next prime is 80908061917. The reversal of 80908061887 is 78816080908.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80908061887 is a prime.

It is a super-2 number, since 2×80908061887² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80908061827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3169387 + ... + 3194812.

It is an arithmetic number, because the mean of its divisors is an integer number (20228609700).

Almost surely, 2^80908061887 is an apocalyptic number.

80908061887 is a deficient number, since it is larger than the sum of its proper divisors (6376913).

80908061887 is a wasteful number, since it uses less digits than its factorization.

80908061887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6376912.

The product of its (nonzero) digits is 1548288, while the sum is 55.

The spelling of 80908061887 in words is "eighty billion, nine hundred eight million, sixty-one thousand, eight hundred eighty-seven".