12277978612 has 12 divisors (see below), whose sum is σ = 22750372260. Its totient is φ = 5777872256.

The previous prime is 12277978579. The next prime is 12277978631. The reversal of 12277978612 is 21687977221.

It can be written as a sum of positive squares in 2 ways, for example, as 6341892496 + 5936086116 = 79636^2 + 77046^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12277978612.

It is a congruent number.

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, 90279187 + ... + 90279322.

It is an arithmetic number, because the mean of its divisors is an integer number (1895864355).

Almost surely, 2^12277978612 is an apocalyptic number.

It is an amenable number.

12277978612 is a deficient number, since it is larger than the sum of its proper divisors (10472393648).

12277978612 is a wasteful number, since it uses less digits than its factorization.

12277978612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180558530 (or 180558528 counting only the distinct ones).

The product of its digits is 1185408, while the sum is 52.

The spelling of 12277978612 in words is "twelve billion, two hundred seventy-seven million, nine hundred seventy-eight thousand, six hundred twelve".