634818122778 has 32 divisors (see below), whose sum is σ = 1451273751936. Its totient is φ = 181343994048.

The previous prime is 634818122773. The next prime is 634818122779. The reversal of 634818122778 is 877221818436.

634818122778 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (634818122773) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1122001 + ... + 1590132.

It is an arithmetic number, because the mean of its divisors is an integer number (45352304748).

Almost surely, 2^634818122778 is an apocalyptic number.

634818122778 is an abundant number, since it is smaller than the sum of its proper divisors (816455629158).

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

634818122778 is a wasteful number, since it uses less digits than its factorization.

634818122778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2717718.

The product of its digits is 7225344, while the sum is 57.

The spelling of 634818122778 in words is "six hundred thirty-four billion, eight hundred eighteen million, one hundred twenty-two thousand, seven hundred seventy-eight".