81367496 has 16 divisors (see below), whose sum is σ = 174359040. Its totient is φ = 34871760.

The previous prime is 81367487. The next prime is 81367511. The reversal of 81367496 is 69476318.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

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, 726440 + ... + 726551.

It is an arithmetic number, because the mean of its divisors is an integer number (10897440).

Almost surely, 2^81367496 is an apocalyptic number.

It is an amenable number.

81367496 is an abundant number, since it is smaller than the sum of its proper divisors (92991544).

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

81367496 is a wasteful number, since it uses less digits than its factorization.

81367496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1453004 (or 1453000 counting only the distinct ones).

The product of its digits is 217728, while the sum is 44.

The square root of 81367496 is about 9020.3933395390. The cubic root of 81367496 is about 433.3282308406.

The spelling of 81367496 in words is "eighty-one million, three hundred sixty-seven thousand, four hundred ninety-six".