8151794242189 has 4 divisors (see below), whose sum is σ = 8778855337756. Its totient is φ = 7524733146624.

The previous prime is 8151794242187. The next prime is 8151794242201. The reversal of 8151794242189 is 9812424971518.

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

It can be written as a sum of positive squares in 2 ways, for example, as 888715342089 + 7263078900100 = 942717^2 + 2695010^2 .

It is a cyclic number.

It is not a de Polignac number, because 8151794242189 - 2¹ = 8151794242187 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 (8151794242187) 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, 313530547764 + ... + 313530547789.

It is an arithmetic number, because the mean of its divisors is an integer number (2194713834439).

Almost surely, 2^{8151794242189} is an apocalyptic number.

It is an amenable number.

8151794242189 is a deficient number, since it is larger than the sum of its proper divisors (627061095567).

8151794242189 is a wasteful number, since it uses less digits than its factorization.

8151794242189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627061095566.

The product of its digits is 11612160, while the sum is 61.

The spelling of 8151794242189 in words is "eight trillion, one hundred fifty-one billion, seven hundred ninety-four million, two hundred forty-two thousand, one hundred eighty-nine".