12551144644 has 12 divisors (see below), whose sum is σ = 22166013100. Its totient is φ = 6217998048.

The previous prime is 12551144539. The next prime is 12551144681. The reversal of 12551144644 is 44644115521.

It can be written as a sum of positive squares in 2 ways, for example, as 3499905600 + 9051239044 = 59160^2 + 95138^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14393079 + ... + 14393950.

Almost surely, 2^12551144644 is an apocalyptic number.

It is an amenable number.

12551144644 is a deficient number, since it is larger than the sum of its proper divisors (9614868456).

12551144644 is a wasteful number, since it uses less digits than its factorization.

12551144644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28787142 (or 28787140 counting only the distinct ones).

The product of its digits is 76800, while the sum is 37.

The spelling of 12551144644 in words is "twelve billion, five hundred fifty-one million, one hundred forty-four thousand, six hundred forty-four".