634643164242 has 24 divisors (see below), whose sum is σ = 1434845415744. Its totient is φ = 202349994264.

The previous prime is 634643164237. The next prime is 634643164279. The reversal of 634643164242 is 242461346436.

634643164242 is a `hidden beast` number, since 6 + 3 + 464 + 3 + 164 + 24 + 2 = 666.

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 11 ways as a sum of consecutive naturals, for example, 766476838 + ... + 766477665.

It is an arithmetic number, because the mean of its divisors is an integer number (59785225656).

Almost surely, 2^634643164242 is an apocalyptic number.

634643164242 is an abundant number, since it is smaller than the sum of its proper divisors (800202251502).

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

634643164242 is a wasteful number, since it uses less digits than its factorization.

634643164242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1532954534 (or 1532954531 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 45.

The spelling of 634643164242 in words is "six hundred thirty-four billion, six hundred forty-three million, one hundred sixty-four thousand, two hundred forty-two".