81614472 has 16 divisors (see below), whose sum is σ = 204036240. Its totient is φ = 27204816.

The previous prime is 81614471. The next prime is 81614479. The reversal of 81614472 is 27441618.

It is not an unprimeable number, because it can be changed into a prime (81614471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1700278 + ... + 1700325.

It is an arithmetic number, because the mean of its divisors is an integer number (12752265).

Almost surely, 2^81614472 is an apocalyptic number.

It is an amenable number.

81614472 is an abundant number, since it is smaller than the sum of its proper divisors (122421768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81614472 is a wasteful number, since it uses less digits than its factorization.

81614472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3400612 (or 3400608 counting only the distinct ones).

The product of its digits is 10752, while the sum is 33.

The square root of 81614472 is about 9034.0728356595. The cubic root of 81614472 is about 433.7662172567.

The spelling of 81614472 in words is "eighty-one million, six hundred fourteen thousand, four hundred seventy-two".