81368037074101 has 4 divisors (see below), whose sum is σ = 82158018016672. Its totient is φ = 80578056131532.

The previous prime is 81368037074087. The next prime is 81368037074161. The reversal of 81368037074101 is 10147073086318.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 81368037074101 - 2²⁵ = 81368003519669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81368037074161) 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, 394990471131 + ... + 394990471336.

It is an arithmetic number, because the mean of its divisors is an integer number (20539504504168).

Almost surely, 2^{81368037074101} is an apocalyptic number.

It is an amenable number.

81368037074101 is a deficient number, since it is larger than the sum of its proper divisors (789980942571).

81368037074101 is a wasteful number, since it uses less digits than its factorization.

81368037074101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789980942570.

The product of its (nonzero) digits is 677376, while the sum is 49.

The spelling of 81368037074101 in words is "eighty-one trillion, three hundred sixty-eight billion, thirty-seven million, seventy-four thousand, one hundred one".