12266520520 has 16 divisors (see below), whose sum is σ = 27599671260. Its totient is φ = 4906608192.

The previous prime is 12266520503. The next prime is 12266520557. The reversal of 12266520520 is 2502566221.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10139281636 + 2127238884 = 100694^2 + 46122^2 .

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, 153331467 + ... + 153331546.

Almost surely, 2^12266520520 is an apocalyptic number.

12266520520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12266520520 is an abundant number, since it is smaller than the sum of its proper divisors (15333150740).

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

12266520520 is a wasteful number, since it uses less digits than its factorization.

12266520520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306663024 (or 306663020 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

The spelling of 12266520520 in words is "twelve billion, two hundred sixty-six million, five hundred twenty thousand, five hundred twenty".