12555457522 has 4 divisors (see below), whose sum is σ = 18833186286. Its totient is φ = 6277728760.

The previous prime is 12555457501. The next prime is 12555457531. The reversal of 12555457522 is 22575455521.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 11060939241 + 1494518281 = 105171^2 + 38659^2 .

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 as a sum of consecutive naturals, namely, 3138864379 + ... + 3138864382.

Almost surely, 2^12555457522 is an apocalyptic number.

12555457522 is a deficient number, since it is larger than the sum of its proper divisors (6277728764).

12555457522 is an equidigital number, since it uses as much as digits as its factorization.

12555457522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6277728763.

The product of its digits is 700000, while the sum is 43.

The spelling of 12555457522 in words is "twelve billion, five hundred fifty-five million, four hundred fifty-seven thousand, five hundred twenty-two".