126420404636 has 12 divisors (see below), whose sum is σ = 230854652112. Its totient is φ = 60461932608.

The previous prime is 126420404629. The next prime is 126420404651. The reversal of 126420404636 is 636404024621.

It is a self number, because there is not a number n which added to its sum of digits gives 126420404636.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 687067325 + ... + 687067508.

It is an arithmetic number, because the mean of its divisors is an integer number (19237887676).

Almost surely, 2^126420404636 is an apocalyptic number.

It is an amenable number.

126420404636 is a deficient number, since it is larger than the sum of its proper divisors (104434247476).

126420404636 is a wasteful number, since it uses less digits than its factorization.

126420404636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1374134860 (or 1374134858 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 38.

The spelling of 126420404636 in words is "one hundred twenty-six billion, four hundred twenty million, four hundred four thousand, six hundred thirty-six".