81496374 has 8 divisors (see below), whose sum is σ = 162992760. Its totient is φ = 27165456.

The previous prime is 81496343. The next prime is 81496403. The reversal of 81496374 is 47369418.

It is a sphenic number, since it is the product of 3 distinct primes.

81496374 is an admirable number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

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, 6791359 + ... + 6791370.

It is an arithmetic number, because the mean of its divisors is an integer number (20374095).

Almost surely, 2^81496374 is an apocalyptic number.

81496374 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

81496374 is a wasteful number, since it uses less digits than its factorization.

81496374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13582734.

The product of its digits is 145152, while the sum is 42.

The square root of 81496374 is about 9027.5342148341. The cubic root of 81496374 is about 433.5568930596.

The spelling of 81496374 in words is "eighty-one million, four hundred ninety-six thousand, three hundred seventy-four".