81677196 has 36 divisors (see below), whose sum is σ = 207217192. Its totient is φ = 27126144.

The previous prime is 81677173. The next prime is 81677203. The reversal of 81677196 is 69177618.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6180 + ... + 14196.

Almost surely, 2^81677196 is an apocalyptic number.

It is an amenable number.

81677196 is an abundant number, since it is smaller than the sum of its proper divisors (125539996).

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

81677196 is a wasteful number, since it uses less digits than its factorization.

81677196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8310 (or 8305 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The square root of 81677196 is about 9037.5436928404. The cubic root of 81677196 is about 433.8773110553.

The spelling of 81677196 in words is "eighty-one million, six hundred seventy-seven thousand, one hundred ninety-six".