81413791303626 has 16 divisors (see below), whose sum is σ = 180919536230400. Its totient is φ = 27137930434524.

The previous prime is 81413791303609. The next prime is 81413791303631. The reversal of 81413791303626 is 62630319731418.

81413791303626 is a `hidden beast` number, since 8 + 1 + 4 + 1 + 3 + 7 + 9 + 1 + 3 + 0 + 3 + 626 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 1507662801919 = 81413791303626 / (8 + 1 + 4 + 1 + 3 + 7 + 9 + 1 + 3 + 0 + 3 + 6 + 2 + 6).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 753831400906 + ... + 753831401013.

It is an arithmetic number, because the mean of its divisors is an integer number (11307471014400).

Almost surely, 2^{81413791303626} is an apocalyptic number.

81413791303626 is an abundant number, since it is smaller than the sum of its proper divisors (99505744926774).

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

81413791303626 is a wasteful number, since it uses less digits than its factorization.

81413791303626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1507662801930 (or 1507662801924 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 54.

The spelling of 81413791303626 in words is "eighty-one trillion, four hundred thirteen billion, seven hundred ninety-one million, three hundred three thousand, six hundred twenty-six".