126506635806 has 16 divisors (see below), whose sum is σ = 253036172304. Its totient is φ = 42165061824.

The previous prime is 126506635777. The next prime is 126506635817. The reversal of 126506635806 is 608536605621.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 881961 + ... + 1015316.

It is an arithmetic number, because the mean of its divisors is an integer number (15814760769).

Almost surely, 2^126506635806 is an apocalyptic number.

126506635806 is an abundant number, since it is smaller than the sum of its proper divisors (126529536498).

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

126506635806 is a wasteful number, since it uses less digits than its factorization.

126506635806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1908395.

The product of its (nonzero) digits is 1555200, while the sum is 48.

The spelling of 126506635806 in words is "one hundred twenty-six billion, five hundred six million, six hundred thirty-five thousand, eight hundred six".