634468196838 has 64 divisors (see below), whose sum is σ = 1461939793920. Its totient is φ = 179814276000.

The previous prime is 634468196827. The next prime is 634468196851. The reversal of 634468196838 is 838691864436.

It is a super-2 number, since 2×634468196838² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4309933 + ... + 4454711.

It is an arithmetic number, because the mean of its divisors is an integer number (22842809280).

Almost surely, 2^634468196838 is an apocalyptic number.

634468196838 is an abundant number, since it is smaller than the sum of its proper divisors (827471597082).

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

634468196838 is a wasteful number, since it uses less digits than its factorization.

634468196838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145633.

The product of its digits is 143327232, while the sum is 66.

The spelling of 634468196838 in words is "six hundred thirty-four billion, four hundred sixty-eight million, one hundred ninety-six thousand, eight hundred thirty-eight".