81914602 has 64 divisors (see below), whose sum is σ = 164975616. Its totient is φ = 29525760.

The previous prime is 81914587. The next prime is 81914639. The reversal of 81914602 is 20641918.

It is a happy number.

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, 175173 + ... + 175639.

It is an arithmetic number, because the mean of its divisors is an integer number (2577744).

Almost surely, 2^81914602 is an apocalyptic number.

81914602 is an abundant number, since it is smaller than the sum of its proper divisors (83061014).

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

81914602 is a wasteful number, since it uses less digits than its factorization.

81914602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 81914602 is about 9050.6685940874. The cubic root of 81914602 is about 434.2972791056.

The spelling of 81914602 in words is "eighty-one million, nine hundred fourteen thousand, six hundred two".