2081157194717 has 4 divisors (see below), whose sum is σ = 2086827923136. Its totient is φ = 2075486466300.

The previous prime is 2081157194687. The next prime is 2081157194737. The reversal of 2081157194717 is 7174917511802.

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 2081157194717 - 2⁸ = 2081157194461 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 (2081157194737) 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, 2835363659 + ... + 2835364392.

It is an arithmetic number, because the mean of its divisors is an integer number (521706980784).

Almost surely, 2^{2081157194717} is an apocalyptic number.

It is an amenable number.

2081157194717 is a deficient number, since it is larger than the sum of its proper divisors (5670728419).

2081157194717 is an equidigital number, since it uses as much as digits as its factorization.

2081157194717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5670728418.

The product of its (nonzero) digits is 987840, while the sum is 53.

The spelling of 2081157194717 in words is "two trillion, eighty-one billion, one hundred fifty-seven million, one hundred ninety-four thousand, seven hundred seventeen".