12157567747 has 8 divisors (see below), whose sum is σ = 13160606144. Its totient is φ = 11164220928.

The previous prime is 12157567703. The next prime is 12157567757. The reversal of 12157567747 is 74776575121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12157567747 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12157567694 and 12157567703.

It is not an unprimeable number, because it can be changed into a prime (12157567757) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2420283 + ... + 2425300.

It is an arithmetic number, because the mean of its divisors is an integer number (1645075768).

Almost surely, 2^12157567747 is an apocalyptic number.

12157567747 is a deficient number, since it is larger than the sum of its proper divisors (1003038397).

12157567747 is a wasteful number, since it uses less digits than its factorization.

12157567747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4845789.

The product of its digits is 2881200, while the sum is 52.

The spelling of 12157567747 in words is "twelve billion, one hundred fifty-seven million, five hundred sixty-seven thousand, seven hundred forty-seven".