126645941808 has 120 divisors (see below), whose sum is σ = 370124033760. Its totient is φ = 40349168640.

The previous prime is 126645941801. The next prime is 126645941809. The reversal of 126645941808 is 808149546621.

126645941808 is a `hidden beast` number, since 1 + 2 + 6 + 6 + 459 + 4 + 180 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (126645941801) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4560028 + ... + 4587716.

It is an arithmetic number, because the mean of its divisors is an integer number (3084366948).

Almost surely, 2^126645941808 is an apocalyptic number.

126645941808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 126645941808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185062016880).

126645941808 is an abundant number, since it is smaller than the sum of its proper divisors (243478091952).

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

126645941808 is a wasteful number, since it uses less digits than its factorization.

126645941808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29107 (or 29098 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 54.

The spelling of 126645941808 in words is "one hundred twenty-six billion, six hundred forty-five million, nine hundred forty-one thousand, eight hundred eight".