12157958369 has 8 divisors (see below), whose sum is σ = 12491495520. Its totient is φ = 11828670336.

The previous prime is 12157958339. The next prime is 12157958383. The reversal of 12157958369 is 96385975121.

It is a happy number.

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-12157958369 is a prime.

It is a super-2 number, since 2×12157958369² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12157958339) 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, 1056479 + ... + 1067924.

It is an arithmetic number, because the mean of its divisors is an integer number (1561436940).

Almost surely, 2^12157958369 is an apocalyptic number.

It is an amenable number.

12157958369 is a deficient number, since it is larger than the sum of its proper divisors (333537151).

12157958369 is an equidigital number, since it uses as much as digits as its factorization.

12157958369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2124559.

The product of its digits is 4082400, while the sum is 56.

The spelling of 12157958369 in words is "twelve billion, one hundred fifty-seven million, nine hundred fifty-eight thousand, three hundred sixty-nine".