126858859809 has 32 divisors (see below), whose sum is σ = 187965536640. Its totient is φ = 76091304960.

The previous prime is 126858859753. The next prime is 126858859861. The reversal of 126858859809 is 908958858621.

It is not a de Polignac number, because 126858859809 - 2³² = 122563892513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (126858859879) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 223557 + ... + 551085.

It is an arithmetic number, because the mean of its divisors is an integer number (5873923020).

Almost surely, 2^126858859809 is an apocalyptic number.

It is an amenable number.

126858859809 is a deficient number, since it is larger than the sum of its proper divisors (61106676831).

126858859809 is an equidigital number, since it uses as much as digits as its factorization.

126858859809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327662 (or 327640 counting only the distinct ones).

The product of its (nonzero) digits is 99532800, while the sum is 69.

The spelling of 126858859809 in words is "one hundred twenty-six billion, eight hundred fifty-eight million, eight hundred fifty-nine thousand, eight hundred nine".