12400636820357 has 4 divisors (see below), whose sum is σ = 12689023723200. Its totient is φ = 12112249917516.

The previous prime is 12400636820347. The next prime is 12400636820413. The reversal of 12400636820357 is 75302863600421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12400636820357 - 2²⁰ = 12400635771781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12400636820347) 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, 144193451357 + ... + 144193451442.

It is an arithmetic number, because the mean of its divisors is an integer number (3172255930800).

Almost surely, 2^{12400636820357} is an apocalyptic number.

It is an amenable number.

12400636820357 is a deficient number, since it is larger than the sum of its proper divisors (288386902843).

12400636820357 is an equidigital number, since it uses as much as digits as its factorization.

12400636820357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288386902842.

The product of its (nonzero) digits is 1451520, while the sum is 47.

The spelling of 12400636820357 in words is "twelve trillion, four hundred billion, six hundred thirty-six million, eight hundred twenty thousand, three hundred fifty-seven".