78985289894 has 16 divisors (see below), whose sum is σ = 140072436000. Its totient is φ = 32683568064.

The previous prime is 78985289869. The next prime is 78985289939. The reversal of 78985289894 is 49898258987.

It is a congruent number.

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, 97272119 + ... + 97272930.

It is an arithmetic number, because the mean of its divisors is an integer number (8754527250).

Almost surely, 2^78985289894 is an apocalyptic number.

78985289894 is a deficient number, since it is larger than the sum of its proper divisors (61087146106).

78985289894 is a wasteful number, since it uses less digits than its factorization.

78985289894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194545087.

The product of its digits is 836075520, while the sum is 77.

The spelling of 78985289894 in words is "seventy-eight billion, nine hundred eighty-five million, two hundred eighty-nine thousand, eight hundred ninety-four".