81769674 has 32 divisors (see below), whose sum is σ = 187808256. Its totient is φ = 23249520.

The previous prime is 81769663. The next prime is 81769733. The reversal of 81769674 is 47696718.

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, 4249 + ... + 13475.

It is an arithmetic number, because the mean of its divisors is an integer number (5869008).

Almost surely, 2^81769674 is an apocalyptic number.

81769674 is an abundant number, since it is smaller than the sum of its proper divisors (106038582).

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

81769674 is a wasteful number, since it uses less digits than its factorization.

81769674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9450.

The product of its digits is 508032, while the sum is 48.

The square root of 81769674 is about 9042.6585692483. The cubic root of 81769674 is about 434.0410000412.

The spelling of 81769674 in words is "eighty-one million, seven hundred sixty-nine thousand, six hundred seventy-four".