81055374 has 8 divisors (see below), whose sum is σ = 162110760. Its totient is φ = 27018456.

The previous prime is 81055369. The next prime is 81055399. The reversal of 81055374 is 47355018.

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

81055374 is an admirable 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, 6754609 + ... + 6754620.

It is an arithmetic number, because the mean of its divisors is an integer number (20263845).

Almost surely, 2^81055374 is an apocalyptic number.

81055374 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.

81055374 is a wasteful number, since it uses less digits than its factorization.

81055374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13509234.

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 81055374 is about 9003.0758077448. The cubic root of 81055374 is about 432.7734450869.

The spelling of 81055374 in words is "eighty-one million, fifty-five thousand, three hundred seventy-four".