12791543157 has 12 divisors (see below), whose sum is σ = 18515253120. Its totient is φ = 8509889448.

The previous prime is 12791543153. The next prime is 12791543159. The reversal of 12791543157 is 75134519721.

12791543157 is a `hidden beast` number, since 1 + 2 + 7 + 91 + 543 + 15 + 7 = 666.

It is not a de Polignac number, because 12791543157 - 2² = 12791543153 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12791543153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1479283 + ... + 1487904.

It is an arithmetic number, because the mean of its divisors is an integer number (1542937760).

Almost surely, 2^12791543157 is an apocalyptic number.

It is an amenable number.

12791543157 is a deficient number, since it is larger than the sum of its proper divisors (5723709963).

12791543157 is a wasteful number, since it uses less digits than its factorization.

12791543157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2967672 (or 2967669 counting only the distinct ones).

The product of its digits is 264600, while the sum is 45.

The spelling of 12791543157 in words is "twelve billion, seven hundred ninety-one million, five hundred forty-three thousand, one hundred fifty-seven".