7894778390608 has 40 divisors (see below), whose sum is σ = 15691283033888. Its totient is φ = 3845877501312.

The previous prime is 7894778390557. The next prime is 7894778390633. The reversal of 7894778390608 is 8060938774987.

It is a super-2 number, since 2×7894778390608² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14178966 + ... + 14725237.

Almost surely, 2^{7894778390608} is an apocalyptic number.

It is an amenable number.

7894778390608 is a deficient number, since it is larger than the sum of its proper divisors (7796504643280).

7894778390608 is a wasteful number, since it uses less digits than its factorization.

7894778390608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28904651 (or 28904645 counting only the distinct ones).

The product of its (nonzero) digits is 1024192512, while the sum is 76.

The spelling of 7894778390608 in words is "seven trillion, eight hundred ninety-four billion, seven hundred seventy-eight million, three hundred ninety thousand, six hundred eight".