12387892256 has 12 divisors (see below), whose sum is σ = 24388662942. Its totient is φ = 6193946112.

The previous prime is 12387892241. The next prime is 12387892259. The reversal of 12387892256 is 65229878321.

It can be written as a sum of positive squares in only one way, i.e., 12384128656 + 3763600 = 111284^2 + 1940^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12387892198 and 12387892207.

It is not an unprimeable number, because it can be changed into a prime (12387892259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193560785 + ... + 193560848.

Almost surely, 2^12387892256 is an apocalyptic number.

12387892256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12387892256 is a deficient number, since it is larger than the sum of its proper divisors (12000770686).

12387892256 is an equidigital number, since it uses as much as digits as its factorization.

12387892256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387121643 (or 387121635 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 53.

The spelling of 12387892256 in words is "twelve billion, three hundred eighty-seven million, eight hundred ninety-two thousand, two hundred fifty-six".