81614995 has 32 divisors (see below), whose sum is σ = 124208640. Its totient is φ = 50000640.

The previous prime is 81614987. The next prime is 81615031. The reversal of 81614995 is 59941618.

It is not a de Polignac number, because 81614995 - 2³ = 81614987 is a prime.

It is a super-2 number, since 2×81614995² = 13322014817700050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20919 + ... + 24511.

It is an arithmetic number, because the mean of its divisors is an integer number (3881520).

Almost surely, 2^81614995 is an apocalyptic number.

81614995 is a deficient number, since it is larger than the sum of its proper divisors (42593645).

81614995 is a wasteful number, since it uses less digits than its factorization.

81614995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3675.

The product of its digits is 77760, while the sum is 43.

The square root of 81614995 is about 9034.1017815829. The cubic root of 81614995 is about 433.7671438049.

The spelling of 81614995 in words is "eighty-one million, six hundred fourteen thousand, nine hundred ninety-five".