80681719442 has 8 divisors (see below), whose sum is σ = 121541990076. Its totient is φ = 40167722752.

The previous prime is 80681719411. The next prime is 80681719471. The reversal of 80681719442 is 24491718608.

It can be written as a sum of positive squares in 2 ways, for example, as 59888367841 + 20793351601 = 244721^2 + 144199^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86567903 + ... + 86568834.

Almost surely, 2^80681719442 is an apocalyptic number.

80681719442 is a deficient number, since it is larger than the sum of its proper divisors (40860270634).

80681719442 is a wasteful number, since it uses less digits than its factorization.

80681719442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173136972.

The product of its (nonzero) digits is 774144, while the sum is 50.

The spelling of 80681719442 in words is "eighty billion, six hundred eighty-one million, seven hundred nineteen thousand, four hundred forty-two".