78881427663644 has 48 divisors (see below), whose sum is σ = 140463954640800. Its totient is φ = 38754676832256.

The previous prime is 78881427663581. The next prime is 78881427663691. The reversal of 78881427663644 is 44636672418887.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98564834 + ... + 99361910.

It is an arithmetic number, because the mean of its divisors is an integer number (2926332388350).

Almost surely, 2^{78881427663644} is an apocalyptic number.

It is an amenable number.

78881427663644 is a deficient number, since it is larger than the sum of its proper divisors (61582526977156).

78881427663644 is a wasteful number, since it uses less digits than its factorization.

78881427663644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798902 (or 798900 counting only the distinct ones).

The product of its digits is 2080899072, while the sum is 74.

The spelling of 78881427663644 in words is "seventy-eight trillion, eight hundred eighty-one billion, four hundred twenty-seven million, six hundred sixty-three thousand, six hundred forty-four".