126685581398 has 32 divisors (see below), whose sum is σ = 198828241920. Its totient is φ = 60467410080.

The previous prime is 126685581377. The next prime is 126685581409. The reversal of 126685581398 is 893185586621.

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (62).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 126685581398.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3372536 + ... + 3409892.

It is an arithmetic number, because the mean of its divisors is an integer number (6213382560).

Almost surely, 2^126685581398 is an apocalyptic number.

126685581398 is a deficient number, since it is larger than the sum of its proper divisors (72142660522).

126685581398 is a wasteful number, since it uses less digits than its factorization.

126685581398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38132.

The product of its digits is 24883200, while the sum is 62.

The spelling of 126685581398 in words is "one hundred twenty-six billion, six hundred eighty-five million, five hundred eighty-one thousand, three hundred ninety-eight".