65474379209688 has 64 divisors (see below), whose sum is σ = 164954142904320. Its totient is φ = 21655738166400.

The previous prime is 65474379209653. The next prime is 65474379209699. The reversal of 65474379209688 is 88690297347456.

It is a super-2 number, since 2×65474379209688² (a number of 28 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 15 ways as a sum of consecutive naturals, for example, 26683881 + ... + 29034087.

It is an arithmetic number, because the mean of its divisors is an integer number (2577408482880).

Almost surely, 2^{65474379209688} is an apocalyptic number.

It is an amenable number.

65474379209688 is an abundant number, since it is smaller than the sum of its proper divisors (99479763694632).

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

65474379209688 is a wasteful number, since it uses less digits than its factorization.

65474379209688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2359208 (or 2359204 counting only the distinct ones).

The product of its (nonzero) digits is 4389396480, while the sum is 78.

The spelling of 65474379209688 in words is "sixty-five trillion, four hundred seventy-four billion, three hundred seventy-nine million, two hundred nine thousand, six hundred eighty-eight".