126125522258 has 18 divisors (see below), whose sum is σ = 199684736901. Its totient is φ = 59739148224.

The previous prime is 126125522251. The next prime is 126125522309. The reversal of 126125522258 is 852225521621.

It can be written as a sum of positive squares in 2 ways, for example, as 124985582089 + 1139940169 = 353533^2 + 33763^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=251123.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (126125522251) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 9536066 + ... + 9549282.

Almost surely, 2^126125522258 is an apocalyptic number.

126125522258 is a deficient number, since it is larger than the sum of its proper divisors (73559214643).

126125522258 is an frugal number, since it uses more digits than its factorization.

126125522258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26474 (or 13238 counting only the distinct ones).

The product of its digits is 192000, while the sum is 41.

The spelling of 126125522258 in words is "one hundred twenty-six billion, one hundred twenty-five million, five hundred twenty-two thousand, two hundred fifty-eight".