81676194 has 32 divisors (see below), whose sum is σ = 175810176. Its totient is φ = 25201920.

The previous prime is 81676181. The next prime is 81676229. The reversal of 81676194 is 49167618.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 342 + ... + 12785.

It is an arithmetic number, because the mean of its divisors is an integer number (5494068).

Almost surely, 2^81676194 is an apocalyptic number.

81676194 is an abundant number, since it is smaller than the sum of its proper divisors (94133982).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81676194 is a wasteful number, since it uses less digits than its factorization.

81676194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13210.

The product of its digits is 72576, while the sum is 42.

The square root of 81676194 is about 9037.4882572538. The cubic root of 81676194 is about 433.8755368071.

The spelling of 81676194 in words is "eighty-one million, six hundred seventy-six thousand, one hundred ninety-four".