12505551453 has 24 divisors (see below), whose sum is σ = 18411721848. Its totient is φ = 8176476672.

The previous prime is 12505551451. The next prime is 12505551473. The reversal of 12505551453 is 35415550521.

12505551453 is a `hidden beast` number, since 1 + 2 + 50 + 5 + 551 + 4 + 53 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 7091829369 + 5413722084 = 84213^2 + 73578^2 .

It is not a de Polignac number, because 12505551453 - 2¹ = 12505551451 is a prime.

It is a super-2 number, since 2×12505551453² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12505551451) 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, 2008401 + ... + 2014617.

It is an arithmetic number, because the mean of its divisors is an integer number (767155077).

Almost surely, 2^12505551453 is an apocalyptic number.

It is an amenable number.

12505551453 is a deficient number, since it is larger than the sum of its proper divisors (5906170395).

12505551453 is a wasteful number, since it uses less digits than its factorization.

12505551453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10493 (or 10490 counting only the distinct ones).

The product of its (nonzero) digits is 75000, while the sum is 36.

The spelling of 12505551453 in words is "twelve billion, five hundred five million, five hundred fifty-one thousand, four hundred fifty-three".