78583922568 has 36 divisors (see below), whose sum is σ = 212837899365. Its totient is φ = 26193847968.

The previous prime is 78583922561. The next prime is 78583922621. The reversal of 78583922568 is 86522938587.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 42346231524 + 36237691044 = 205782^2 + 190362^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=198222.

It is not an unprimeable number, because it can be changed into a prime (78583922561) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2362146 + ... + 2395182.

Almost surely, 2^78583922568 is an apocalyptic number.

It is an amenable number.

78583922568 is an abundant number, since it is smaller than the sum of its proper divisors (134253976797).

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

78583922568 is an frugal number, since it uses more digits than its factorization.

78583922568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66086 (or 33042 counting only the distinct ones).

The product of its digits is 58060800, while the sum is 63.

The spelling of 78583922568 in words is "seventy-eight billion, five hundred eighty-three million, nine hundred twenty-two thousand, five hundred sixty-eight".