12552521445 has 12 divisors (see below), whose sum is σ = 21757703916. Its totient is φ = 6694678080.

The previous prime is 12552521393. The next prime is 12552521447. The reversal of 12552521445 is 54412525521.

12552521445 is a `hidden beast` number, since 1 + 2 + 552 + 52 + 14 + 45 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 4091649156 + 8460872289 = 63966^2 + 91983^2 .

It is not a de Polignac number, because 12552521445 - 2¹⁴ = 12552505061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12552521447) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 139472416 + ... + 139472505.

It is an arithmetic number, because the mean of its divisors is an integer number (1813141993).

Almost surely, 2^12552521445 is an apocalyptic number.

12552521445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12552521445 is a deficient number, since it is larger than the sum of its proper divisors (9205182471).

12552521445 is a wasteful number, since it uses less digits than its factorization.

12552521445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278944932 (or 278944929 counting only the distinct ones).

The product of its digits is 80000, while the sum is 36.

The spelling of 12552521445 in words is "twelve billion, five hundred fifty-two million, five hundred twenty-one thousand, four hundred forty-five".