12587779244 has 24 divisors (see below), whose sum is σ = 22300078080. Its totient is φ = 6216766416.

The previous prime is 12587779229. The next prime is 12587779249. The reversal of 12587779244 is 44297778521.

It is a self number, because there is not a number n which added to its sum of digits gives 12587779244.

It is not an unprimeable number, because it can be changed into a prime (12587779249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60737 + ... + 169895.

It is an arithmetic number, because the mean of its divisors is an integer number (929169920).

Almost surely, 2^12587779244 is an apocalyptic number.

It is an amenable number.

12587779244 is a deficient number, since it is larger than the sum of its proper divisors (9712298836).

12587779244 is a wasteful number, since it uses less digits than its factorization.

12587779244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109517 (or 109515 counting only the distinct ones).

The product of its digits is 7902720, while the sum is 56.

The spelling of 12587779244 in words is "twelve billion, five hundred eighty-seven million, seven hundred seventy-nine thousand, two hundred forty-four".