126166540444 has 36 divisors (see below), whose sum is σ = 256867204944. Its totient is φ = 54065442816.

The previous prime is 126166540421. The next prime is 126166540471. The reversal of 126166540444 is 444045661621.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 126166540444.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2077657 + ... + 2137519.

Almost surely, 2^126166540444 is an apocalyptic number.

126166540444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

126166540444 is an abundant number, since it is smaller than the sum of its proper divisors (130700664500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

126166540444 is a wasteful number, since it uses less digits than its factorization.

126166540444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70634 (or 70625 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 43.

The spelling of 126166540444 in words is "one hundred twenty-six billion, one hundred sixty-six million, five hundred forty thousand, four hundred forty-four".