81368495 has 16 divisors (see below), whose sum is σ = 105380352. Its totient is φ = 59957760.

The previous prime is 81368491. The next prime is 81368527. The reversal of 81368495 is 59486318.

It is not a de Polignac number, because 81368495 - 2² = 81368491 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81368491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37490 + ... + 39600.

It is an arithmetic number, because the mean of its divisors is an integer number (6586272).

Almost surely, 2^81368495 is an apocalyptic number.

81368495 is a deficient number, since it is larger than the sum of its proper divisors (24011857).

81368495 is a wasteful number, since it uses less digits than its factorization.

81368495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2722.

The product of its digits is 207360, while the sum is 44.

The square root of 81368495 is about 9020.4487138944. The cubic root of 81368495 is about 433.3300042479.

The spelling of 81368495 in words is "eighty-one million, three hundred sixty-eight thousand, four hundred ninety-five".