12522531261556 has 12 divisors (see below), whose sum is σ = 21940864490020. Its totient is φ = 6253712835840.

The previous prime is 12522531261517. The next prime is 12522531261587. The reversal of 12522531261556 is 65516213522521.

It can be written as a sum of positive squares in 2 ways, for example, as 5340184861456 + 7182346400100 = 2310884^2 + 2679990^2 .

It is a super-2 number, since 2×12522531261556² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1888195005 + ... + 1888201636.

Almost surely, 2^{12522531261556} is an apocalyptic number.

It is an amenable number.

12522531261556 is a deficient number, since it is larger than the sum of its proper divisors (9418333228464).

12522531261556 is a wasteful number, since it uses less digits than its factorization.

12522531261556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3776397474 (or 3776397472 counting only the distinct ones).

The product of its digits is 1080000, while the sum is 46.

The spelling of 12522531261556 in words is "twelve trillion, five hundred twenty-two billion, five hundred thirty-one million, two hundred sixty-one thousand, five hundred fifty-six".