81413193610720 has 96 divisors (see below), whose sum is σ = 203025720844800. Its totient is φ = 30765378249216.

The previous prime is 81413193610711. The next prime is 81413193610741. The reversal of 81413193610720 is 2701639131418.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36207604 + ... + 38390323.

It is an arithmetic number, because the mean of its divisors is an integer number (2114851258800).

Almost surely, 2^{81413193610720} is an apocalyptic number.

81413193610720 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

81413193610720 is an abundant number, since it is smaller than the sum of its proper divisors (121612527234080).

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

81413193610720 is a wasteful number, since it uses less digits than its factorization.

81413193610720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74598320 (or 74598312 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 46.

The spelling of 81413193610720 in words is "eighty-one trillion, four hundred thirteen billion, one hundred ninety-three million, six hundred ten thousand, seven hundred twenty".