81413595 has 48 divisors (see below), whose sum is σ = 154282752. Its totient is φ = 39536640.

The previous prime is 81413593. The next prime is 81413609. The reversal of 81413595 is 59531418.

It is not a de Polignac number, because 81413595 - 2¹ = 81413593 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (81413593) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21999 + ... + 25431.

It is an arithmetic number, because the mean of its divisors is an integer number (3214224).

Almost surely, 2^81413595 is an apocalyptic number.

81413595 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

81413595 is a deficient number, since it is larger than the sum of its proper divisors (72869157).

81413595 is a wasteful number, since it uses less digits than its factorization.

81413595 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3492 (or 3489 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 81413595 is about 9022.9482432296. The cubic root of 81413595 is about 433.4100498625.

The spelling of 81413595 in words is "eighty-one million, four hundred thirteen thousand, five hundred ninety-five".