126881578905 has 8 divisors (see below), whose sum is σ = 203010526272. Its totient is φ = 67670175408.

The previous prime is 126881578897. The next prime is 126881578909. The reversal of 126881578905 is 509875188621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 126881578905 - 2³ = 126881578897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (126881578909) 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 7 ways as a sum of consecutive naturals, for example, 4229385949 + ... + 4229385978.

It is an arithmetic number, because the mean of its divisors is an integer number (25376315784).

Almost surely, 2^126881578905 is an apocalyptic number.

126881578905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

126881578905 is a deficient number, since it is larger than the sum of its proper divisors (76128947367).

126881578905 is an equidigital number, since it uses as much as digits as its factorization.

126881578905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8458771935.

The product of its (nonzero) digits is 9676800, while the sum is 60.

The spelling of 126881578905 in words is "one hundred twenty-six billion, eight hundred eighty-one million, five hundred seventy-eight thousand, nine hundred five".