12154778068 has 12 divisors (see below), whose sum is σ = 21359862720. Its totient is φ = 6051960152.

The previous prime is 12154778039. The next prime is 12154778071. The reversal of 12154778068 is 86087745121.

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, 6356146 + ... + 6358057.

It is an arithmetic number, because the mean of its divisors is an integer number (1779988560).

Almost surely, 2^12154778068 is an apocalyptic number.

It is an amenable number.

12154778068 is a deficient number, since it is larger than the sum of its proper divisors (9205084652).

12154778068 is a wasteful number, since it uses less digits than its factorization.

12154778068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12714446 (or 12714444 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 49.

The spelling of 12154778068 in words is "twelve billion, one hundred fifty-four million, seven hundred seventy-eight thousand, sixty-eight".