81607139314 has 8 divisors (see below), whose sum is σ = 124087568220. Its totient is φ = 40244616576.

The previous prime is 81607139291. The next prime is 81607139351. The reversal of 81607139314 is 41393170618.

It can be written as a sum of positive squares in 2 ways, for example, as 77715500625 + 3891638689 = 278775^2 + 62383^2 .

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, 279476359 + ... + 279476650.

Almost surely, 2^81607139314 is an apocalyptic number.

81607139314 is a deficient number, since it is larger than the sum of its proper divisors (42480428906).

81607139314 is a wasteful number, since it uses less digits than its factorization.

81607139314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558953084.

The product of its (nonzero) digits is 108864, while the sum is 43.

The spelling of 81607139314 in words is "eighty-one billion, six hundred seven million, one hundred thirty-nine thousand, three hundred fourteen".