81495655 has 16 divisors (see below), whose sum is σ = 106495200. Its totient is φ = 59633280.

The previous prime is 81495649. The next prime is 81495677. The reversal of 81495655 is 55659418.

It is not a de Polignac number, because 81495655 - 2¹⁷ = 81364583 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12036 + ... + 17545.

It is an arithmetic number, because the mean of its divisors is an integer number (6655950).

Almost surely, 2^81495655 is an apocalyptic number.

81495655 is a deficient number, since it is larger than the sum of its proper divisors (24999545).

81495655 is a wasteful number, since it uses less digits than its factorization.

81495655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29634.

The product of its digits is 216000, while the sum is 43.

The square root of 81495655 is about 9027.4943921334. The cubic root of 81495655 is about 433.5556180404. Note that the first 3 decimals are identical.

It can be divided in two parts, 814 and 95655, that added together give a palindrome (96469).

The spelling of 81495655 in words is "eighty-one million, four hundred ninety-five thousand, six hundred fifty-five".