15168197137 has 4 divisors (see below), whose sum is σ = 15170471460. Its totient is φ = 15165922816.

The previous prime is 15168197131. The next prime is 15168197171. The reversal of 15168197137 is 73179186151.

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 10346144656 + 4822052481 = 101716^2 + 69441^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15168197137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15168197131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1127128 + ... + 1140505.

It is an arithmetic number, because the mean of its divisors is an integer number (3792617865).

Almost surely, 2^15168197137 is an apocalyptic number.

It is an amenable number.

15168197137 is a deficient number, since it is larger than the sum of its proper divisors (2274323).

15168197137 is an equidigital number, since it uses as much as digits as its factorization.

15168197137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2274322.

The product of its digits is 317520, while the sum is 49.

The spelling of 15168197137 in words is "fifteen billion, one hundred sixty-eight million, one hundred ninety-seven thousand, one hundred thirty-seven".