12257681377 has 4 divisors (see below), whose sum is σ = 12978721476. Its totient is φ = 11536641280.

The previous prime is 12257681347. The next prime is 12257681383. The reversal of 12257681377 is 77318675221.

It is a happy number.

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 11353115601 + 904565776 = 106551^2 + 30076^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12257681377 is a prime.

It is a super-2 number, since 2×12257681377² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12257681377.

It is not an unprimeable number, because it can be changed into a prime (12257681347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 360520024 + ... + 360520057.

It is an arithmetic number, because the mean of its divisors is an integer number (3244680369).

Almost surely, 2^12257681377 is an apocalyptic number.

12257681377 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

12257681377 is a deficient number, since it is larger than the sum of its proper divisors (721040099).

12257681377 is an equidigital number, since it uses as much as digits as its factorization.

12257681377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721040098.

The product of its digits is 987840, while the sum is 49.

The spelling of 12257681377 in words is "twelve billion, two hundred fifty-seven million, six hundred eighty-one thousand, three hundred seventy-seven".