126656636 has 24 divisors (see below), whose sum is σ = 223907040. Its totient is φ = 62687232.

The previous prime is 126656633. The next prime is 126656639. The reversal of 126656636 is 636656621.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (126656633) and next prime (126656639).

It is a junction number, because it is equal to n+sod(n) for n = 126656593 and 126656602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126656633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 276920 + ... + 277376.

It is an arithmetic number, because the mean of its divisors is an integer number (9329460).

Almost surely, 2^126656636 is an apocalyptic number.

It is an amenable number.

126656636 is a deficient number, since it is larger than the sum of its proper divisors (97250404).

126656636 is a wasteful number, since it uses less digits than its factorization.

126656636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1013 (or 1011 counting only the distinct ones).

The product of its digits is 233280, while the sum is 41.

The square root of 126656636 is about 11254.1830445395. The cubic root of 126656636 is about 502.1991611989.

The spelling of 126656636 in words is "one hundred twenty-six million, six hundred fifty-six thousand, six hundred thirty-six".