81614337732 has 144 divisors (see below), whose sum is σ = 233261683200. Its totient is φ = 23923952640.

The previous prime is 81614337697. The next prime is 81614337793. The reversal of 81614337732 is 23773341618.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 476019 + ... + 624357.

It is an arithmetic number, because the mean of its divisors is an integer number (1619872800).

Almost surely, 2^81614337732 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81614337732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116630841600).

81614337732 is an abundant number, since it is smaller than the sum of its proper divisors (151647345468).

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

81614337732 is a wasteful number, since it uses less digits than its factorization.

81614337732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148426 (or 148421 counting only the distinct ones).

The product of its digits is 508032, while the sum is 45.

The spelling of 81614337732 in words is "eighty-one billion, six hundred fourteen million, three hundred thirty-seven thousand, seven hundred thirty-two".