80716982687 has 4 divisors (see below), whose sum is σ = 88054890216. Its totient is φ = 73379075160.

The previous prime is 80716982677. The next prime is 80716982729. The reversal of 80716982687 is 78628961708.

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

It is a cyclic number.

It is not a de Polignac number, because 80716982687 - 2⁸ = 80716982431 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 (80716982677) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3668953748 + ... + 3668953769.

It is an arithmetic number, because the mean of its divisors is an integer number (22013722554).

Almost surely, 2^80716982687 is an apocalyptic number.

80716982687 is a deficient number, since it is larger than the sum of its proper divisors (7337907529).

80716982687 is a wasteful number, since it uses less digits than its factorization.

80716982687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7337907528.

The product of its (nonzero) digits is 16257024, while the sum is 62.

The spelling of 80716982687 in words is "eighty billion, seven hundred sixteen million, nine hundred eighty-two thousand, six hundred eighty-seven".