12550220525 has 24 divisors (see below), whose sum is σ = 16110635520. Its totient is φ = 9686900160.

The previous prime is 12550220521. The next prime is 12550220533. The reversal of 12550220525 is 52502205521.

It is not a de Polignac number, because 12550220525 - 2² = 12550220521 is a prime.

It is a super-2 number, since 2×12550220525² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12550220521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1130552 + ... + 1141598.

It is an arithmetic number, because the mean of its divisors is an integer number (671276480).

Almost surely, 2^12550220525 is an apocalyptic number.

It is an amenable number.

12550220525 is a deficient number, since it is larger than the sum of its proper divisors (3560414995).

12550220525 is a wasteful number, since it uses less digits than its factorization.

12550220525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12653 (or 12648 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 29.

The spelling of 12550220525 in words is "twelve billion, five hundred fifty million, two hundred twenty thousand, five hundred twenty-five".