2636861423144 has 32 divisors (see below), whose sum is σ = 5324962629000. Its totient is φ = 1216891613952.

The previous prime is 2636861423107. The next prime is 2636861423149. The reversal of 2636861423144 is 4413241686362.

It can be written as a sum of positive squares in 4 ways, for example, as 1906161287044 + 730700136100 = 1380638^2 + 854810^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2636861423092 and 2636861423101.

It is not an unprimeable number, because it can be changed into a prime (2636861423149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211859 + ... + 2306210.

Almost surely, 2^{2636861423144} is an apocalyptic number.

It is an amenable number.

2636861423144 is an abundant number, since it is smaller than the sum of its proper divisors (2688101205856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2636861423144 is a wasteful number, since it uses less digits than its factorization.

2636861423144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2528157 (or 2528153 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 50.

The spelling of 2636861423144 in words is "two trillion, six hundred thirty-six billion, eight hundred sixty-one million, four hundred twenty-three thousand, one hundred forty-four".