81602614 has 4 divisors (see below), whose sum is σ = 122403924. Its totient is φ = 40801306.

The previous prime is 81602603. The next prime is 81602617. The reversal of 81602614 is 41620618.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×81602614² = 13317973223265992, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81602617) 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 as a sum of consecutive naturals, namely, 20400652 + ... + 20400655.

It is an arithmetic number, because the mean of its divisors is an integer number (30600981).

Almost surely, 2^81602614 is an apocalyptic number.

81602614 is a deficient number, since it is larger than the sum of its proper divisors (40801310).

81602614 is a wasteful number, since it uses less digits than its factorization.

81602614 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40801309.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 81602614 is about 9033.4165186822. The cubic root of 81602614 is about 433.7452085278.

The spelling of 81602614 in words is "eighty-one million, six hundred two thousand, six hundred fourteen".