636064272426 has 96 divisors (see below), whose sum is σ = 1422292374720. Its totient is φ = 188066726400.

The previous prime is 636064272413. The next prime is 636064272439. The reversal of 636064272426 is 624272460636.

It is an interprime number because it is at equal distance from previous prime (636064272413) and next prime (636064272439).

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 149977666 + ... + 149981906.

It is an arithmetic number, because the mean of its divisors is an integer number (14815545570).

Almost surely, 2^636064272426 is an apocalyptic number.

636064272426 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 636064272426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (711146187360).

636064272426 is an abundant number, since it is smaller than the sum of its proper divisors (786228102294).

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

636064272426 is a wasteful number, since it uses less digits than its factorization.

636064272426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5572 (or 5529 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 48.

The spelling of 636064272426 in words is "six hundred thirty-six billion, sixty-four million, two hundred seventy-two thousand, four hundred twenty-six".