81674468 has 24 divisors (see below), whose sum is σ = 145471872. Its totient is φ = 40117824.

The previous prime is 81674459. The next prime is 81674471. The reversal of 81674468 is 86447618.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55721 + ... + 57167.

It is an arithmetic number, because the mean of its divisors is an integer number (6061328).

Almost surely, 2^81674468 is an apocalyptic number.

It is an amenable number.

81674468 is a deficient number, since it is larger than the sum of its proper divisors (63797404).

81674468 is a wasteful number, since it uses less digits than its factorization.

81674468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1691 (or 1689 counting only the distinct ones).

The product of its digits is 258048, while the sum is 44.

The square root of 81674468 is about 9037.3927656155. The cubic root of 81674468 is about 433.8724805333.

The spelling of 81674468 in words is "eighty-one million, six hundred seventy-four thousand, four hundred sixty-eight".