126402005646 has 48 divisors (see below), whose sum is σ = 313137568224. Its totient is φ = 36098459712.

The previous prime is 126402005623. The next prime is 126402005713. The reversal of 126402005646 is 646500204621.

126402005646 is a `hidden beast` number, since 1 + 2 + 6 + 4 + 0 + 2 + 0 + 0 + 5 + 646 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 126402005646.

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 23 ways as a sum of consecutive naturals, for example, 52180 + ... + 505496.

It is an arithmetic number, because the mean of its divisors is an integer number (6523699338).

Almost surely, 2^126402005646 is an apocalyptic number.

126402005646 is an abundant number, since it is smaller than the sum of its proper divisors (186735562578).

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

126402005646 is a wasteful number, since it uses less digits than its factorization.

126402005646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455545 (or 455542 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The spelling of 126402005646 in words is "one hundred twenty-six billion, four hundred two million, five thousand, six hundred forty-six".