636126007412 has 24 divisors (see below), whose sum is σ = 1287580357056. Its totient is φ = 269340787008.

The previous prime is 636126007409. The next prime is 636126007417. The reversal of 636126007412 is 214700621636.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636126007417) 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, 136857833 + ... + 136862480.

It is an arithmetic number, because the mean of its divisors is an integer number (53649181544).

Almost surely, 2^636126007412 is an apocalyptic number.

It is an amenable number.

636126007412 is an abundant number, since it is smaller than the sum of its proper divisors (651454349644).

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

636126007412 is a wasteful number, since it uses less digits than its factorization.

636126007412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273720407 (or 273720405 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 38.

The spelling of 636126007412 in words is "six hundred thirty-six billion, one hundred twenty-six million, seven thousand, four hundred twelve".