12138849654 has 16 divisors (see below), whose sum is σ = 24454910448. Its totient is φ = 4016748032.

The previous prime is 12138849649. The next prime is 12138849691. The reversal of 12138849654 is 45694883121.

It is a junction number, because it is equal to n+sod(n) for n = 12138849597 and 12138849606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7382907 + ... + 7384550.

It is an arithmetic number, because the mean of its divisors is an integer number (1528431903).

Almost surely, 2^12138849654 is an apocalyptic number.

12138849654 is an abundant number, since it is smaller than the sum of its proper divisors (12316060794).

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

12138849654 is a wasteful number, since it uses less digits than its factorization.

12138849654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14767599.

The product of its digits is 1658880, while the sum is 51.

The spelling of 12138849654 in words is "twelve billion, one hundred thirty-eight million, eight hundred forty-nine thousand, six hundred fifty-four".