636430670340 has 24 divisors (see below), whose sum is σ = 1782005877120. Its totient is φ = 169714845408.

The previous prime is 636430670257. The next prime is 636430670347. The reversal of 636430670340 is 43076034636.

It is a junction number, because it is equal to n+sod(n) for n = 636430670292 and 636430670301.

It is not an unprimeable number, because it can be changed into a prime (636430670347) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5303588860 + ... + 5303588979.

It is an arithmetic number, because the mean of its divisors is an integer number (74250244880).

Almost surely, 2^636430670340 is an apocalyptic number.

636430670340 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

636430670340 is an abundant number, since it is smaller than the sum of its proper divisors (1145575206780).

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

636430670340 is a wasteful number, since it uses less digits than its factorization.

636430670340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10607177851 (or 10607177849 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 42.

The spelling of 636430670340 in words is "six hundred thirty-six billion, four hundred thirty million, six hundred seventy thousand, three hundred forty".