126447681919790 has 32 divisors (see below), whose sum is σ = 283768304361984. Its totient is φ = 39412264494240.

The previous prime is 126447681919763. The next prime is 126447681919799. The reversal of 126447681919790 is 97919186744621.

It is a Smith number, since the sum of its digits (74) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126447681919799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82108883594 + ... + 82108885133.

It is an arithmetic number, because the mean of its divisors is an integer number (8867759511312).

Almost surely, 2^{126447681919790} is an apocalyptic number.

126447681919790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

126447681919790 is an abundant number, since it is smaller than the sum of its proper divisors (157320622442194).

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

126447681919790 is a wasteful number, since it uses less digits than its factorization.

126447681919790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164217768752.

The product of its (nonzero) digits is 329204736, while the sum is 74.

The spelling of 126447681919790 in words is "one hundred twenty-six trillion, four hundred forty-seven billion, six hundred eighty-one million, nine hundred nineteen thousand, seven hundred ninety".