634196868686 has 16 divisors (see below), whose sum is σ = 1039745911680. Its totient is φ = 288818307840.

The previous prime is 634196868623. The next prime is 634196868733. The reversal of 634196868686 is 686868691436.

It is a super-2 number, since 2×634196868686² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 300851351 + ... + 300853458.

It is an arithmetic number, because the mean of its divisors is an integer number (64984119480).

Almost surely, 2^634196868686 is an apocalyptic number.

634196868686 is a deficient number, since it is larger than the sum of its proper divisors (405549042994).

634196868686 is a wasteful number, since it uses less digits than its factorization.

634196868686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601704859.

The product of its digits is 429981696, while the sum is 71.

The spelling of 634196868686 in words is "six hundred thirty-four billion, one hundred ninety-six million, eight hundred sixty-eight thousand, six hundred eighty-six".