81655294 has 16 divisors (see below), whose sum is σ = 140252256. Its totient is φ = 34927200.

The previous prime is 81655289. The next prime is 81655349. The reversal of 81655294 is 49255618.

It is a super-3 number, since 3×81655294³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

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, 2184 + ... + 12964.

It is an arithmetic number, because the mean of its divisors is an integer number (8765766).

Almost surely, 2^81655294 is an apocalyptic number.

81655294 is a deficient number, since it is larger than the sum of its proper divisors (58596962).

81655294 is a wasteful number, since it uses less digits than its factorization.

81655294 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11331.

The product of its digits is 86400, while the sum is 40.

The square root of 81655294 is about 9036.3318885486. The cubic root of 81655294 is about 433.8385257278.

The spelling of 81655294 in words is "eighty-one million, six hundred fifty-five thousand, two hundred ninety-four".