12149771076 has 27 divisors (see below), whose sum is σ = 30713593183. Its totient is φ = 4049703240.

The previous prime is 12149771047. The next prime is 12149771077. The reversal of 12149771076 is 67017794121.

The square root of 12149771076 is 110226.

It is a perfect power (a square), and thus also a powerful number.

12149771076 is a `hidden beast` number, since 1 + 21 + 497 + 71 + 0 + 76 = 666.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12149771077) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 652171 + ... + 670541.

Almost surely, 2^12149771076 is an apocalyptic number.

12149771076 is the 110226-th square number.

It is an amenable number.

12149771076 is an abundant number, since it is smaller than the sum of its proper divisors (18563822107).

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

12149771076 is an frugal number, since it uses more digits than its factorization.

12149771076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36752 (or 18376 counting only the distinct ones).

The product of its (nonzero) digits is 148176, while the sum is 45.

It can be divided in two parts, 12149 and 771076, that added together give a square (783225 = 885²).

The spelling of 12149771076 in words is "twelve billion, one hundred forty-nine million, seven hundred seventy-one thousand, seventy-six".