78633317841664 has 36 divisors (see below), whose sum is σ = 156970626797656. Its totient is φ = 39313865336832.

The previous prime is 78633317841641. The next prime is 78633317841671. The reversal of 78633317841664 is 46614871333687.

78633317841664 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 78633317841664.

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, 7300149 + ... + 14510644.

Almost surely, 2^{78633317841664} is an apocalyptic number.

It is an amenable number.

78633317841664 is a deficient number, since it is larger than the sum of its proper divisors (78337308955992).

78633317841664 is a wasteful number, since it uses less digits than its factorization.

78633317841664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21824892 (or 21824878 counting only the distinct ones).

The product of its digits is 292626432, while the sum is 67.

The spelling of 78633317841664 in words is "seventy-eight trillion, six hundred thirty-three billion, three hundred seventeen million, eight hundred forty-one thousand, six hundred sixty-four".