81413791303627 has 4 divisors (see below), whose sum is σ = 81607173231136. Its totient is φ = 81220409376120.

The previous prime is 81413791303609. The next prime is 81413791303631. The reversal of 81413791303627 is 72630319731418.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 81413791303627 - 2⁷ = 81413791303499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81413791303727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96690963123 + ... + 96690963964.

It is an arithmetic number, because the mean of its divisors is an integer number (20401793307784).

Almost surely, 2^{81413791303627} is an apocalyptic number.

81413791303627 is a deficient number, since it is larger than the sum of its proper divisors (193381927509).

81413791303627 is a wasteful number, since it uses less digits than its factorization.

81413791303627 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193381927508.

The product of its (nonzero) digits is 4572288, while the sum is 55.

The spelling of 81413791303627 in words is "eighty-one trillion, four hundred thirteen billion, seven hundred ninety-one million, three hundred three thousand, six hundred twenty-seven".