126909986944 has 64 divisors (see below), whose sum is σ = 272557333440. Its totient is φ = 58513499136.

The previous prime is 126909986927. The next prime is 126909987047. The reversal of 126909986944 is 449689909621.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×126909986944² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 126909986944.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1596919 + ... + 1674505.

It is an arithmetic number, because the mean of its divisors is an integer number (4258708335).

Almost surely, 2^126909986944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 126909986944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136278666720).

126909986944 is an abundant number, since it is smaller than the sum of its proper divisors (145647346496).

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

126909986944 is an equidigital number, since it uses as much as digits as its factorization.

126909986944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78597 (or 78585 counting only the distinct ones).

The product of its (nonzero) digits is 60466176, while the sum is 67.

The spelling of 126909986944 in words is "one hundred twenty-six billion, nine hundred nine million, nine hundred eighty-six thousand, nine hundred forty-four".