126771885618 has 128 divisors (see below), whose sum is σ = 295938220032. Its totient is φ = 35459652096.

The previous prime is 126771885607. The next prime is 126771885637. The reversal of 126771885618 is 816588177621.

It is a super-2 number, since 2×126771885618² (a number of 23 digits) contains 22 as substring.

It is a Curzon 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 63 ways as a sum of consecutive naturals, for example, 174376371 + ... + 174377097.

It is an arithmetic number, because the mean of its divisors is an integer number (2312017344).

Almost surely, 2^126771885618 is an apocalyptic number.

126771885618 is an abundant number, since it is smaller than the sum of its proper divisors (169166334414).

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

126771885618 is a wasteful number, since it uses less digits than its factorization.

126771885618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1248.

The product of its digits is 9031680, while the sum is 60.

The spelling of 126771885618 in words is "one hundred twenty-six billion, seven hundred seventy-one million, eight hundred eighty-five thousand, six hundred eighteen".