81413451232 has 96 divisors (see below), whose sum is σ = 163889091072. Its totient is φ = 39804685824.

The previous prime is 81413451199. The next prime is 81413451257. The reversal of 81413451232 is 23215431418.

Its product of digits (23040) is a multiple of the sum of its prime factors (1280).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98922373 + ... + 98923195.

It is an arithmetic number, because the mean of its divisors is an integer number (1707178032).

Almost surely, 2^81413451232 is an apocalyptic number.

It is an amenable number.

81413451232 is an abundant number, since it is smaller than the sum of its proper divisors (82475639840).

81413451232 is a wasteful number, since it uses less digits than its factorization.

81413451232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1280 (or 1272 counting only the distinct ones).

The product of its digits is 23040, while the sum is 34.

The spelling of 81413451232 in words is "eighty-one billion, four hundred thirteen million, four hundred fifty-one thousand, two hundred thirty-two".