126825617522 has 18 divisors (see below), whose sum is σ = 191011361229. Its totient is φ = 63156205200.

The previous prime is 126825617491. The next prime is 126825617603. The reversal of 126825617522 is 225716528621.

It can be written as a sum of positive squares in 2 ways, for example, as 109845182041 + 16980435481 = 331429^2 + 130309^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=251819.

It is a Duffinian 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 8 ways as a sum of consecutive naturals, for example, 211024022 + ... + 211024622.

Almost surely, 2^126825617522 is an apocalyptic number.

126825617522 is a deficient number, since it is larger than the sum of its proper divisors (64185743707).

126825617522 is an frugal number, since it uses more digits than its factorization.

126825617522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2042 (or 1022 counting only the distinct ones).

The product of its digits is 806400, while the sum is 47.

The spelling of 126825617522 in words is "one hundred twenty-six billion, eight hundred twenty-five million, six hundred seventeen thousand, five hundred twenty-two".