78198596464 has 20 divisors (see below), whose sum is σ = 152138459440. Its totient is φ = 38937058560.

The previous prime is 78198596459. The next prime is 78198596491. The reversal of 78198596464 is 46469589187.

It is a happy number.

It is a super-2 number, since 2×78198596464² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78198596464.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10136004 + ... + 10143715.

It is an arithmetic number, because the mean of its divisors is an integer number (7606922972).

Almost surely, 2^78198596464 is an apocalyptic number.

It is an amenable number.

78198596464 is a deficient number, since it is larger than the sum of its proper divisors (73939862976).

78198596464 is a wasteful number, since it uses less digits than its factorization.

78198596464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20279968 (or 20279962 counting only the distinct ones).

The product of its digits is 104509440, while the sum is 67.

The spelling of 78198596464 in words is "seventy-eight billion, one hundred ninety-eight million, five hundred ninety-six thousand, four hundred sixty-four".