81314602344 has 48 divisors (see below), whose sum is σ = 225598447620. Its totient is φ = 26443772160.

The previous prime is 81314602337. The next prime is 81314602361. The reversal of 81314602344 is 44320641318.

81314602344 is a `hidden beast` number, since 8 + 1 + 3 + 1 + 4 + 602 + 3 + 44 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 58244030244 + 23070572100 = 241338^2 + 151890^2 .

It is a super-2 number, since 2×81314602344² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 81314602299 and 81314602308.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13769847 + ... + 13775750.

Almost surely, 2^81314602344 is an apocalyptic number.

It is an amenable number.

81314602344 is an abundant number, since it is smaller than the sum of its proper divisors (144283845276).

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

81314602344 is a wasteful number, since it uses less digits than its factorization.

81314602344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27545650 (or 27545643 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The spelling of 81314602344 in words is "eighty-one billion, three hundred fourteen million, six hundred two thousand, three hundred forty-four".