78678634244 has 24 divisors (see below), whose sum is σ = 157406484480. Its totient is φ = 33708868416.

The previous prime is 78678634211. The next prime is 78678634289. The reversal of 78678634244 is 44243687687.

It is a super-2 number, since 2×78678634244² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 347972 + ... + 527675.

It is an arithmetic number, because the mean of its divisors is an integer number (6558603520).

Almost surely, 2^78678634244 is an apocalyptic number.

It is an amenable number.

78678634244 is an abundant number, since it is smaller than the sum of its proper divisors (78727850236).

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

78678634244 is a wasteful number, since it uses less digits than its factorization.

78678634244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 878867 (or 878865 counting only the distinct ones).

The product of its digits is 43352064, while the sum is 59.

The spelling of 78678634244 in words is "seventy-eight billion, six hundred seventy-eight million, six hundred thirty-four thousand, two hundred forty-four".