78881651555212 has 24 divisors (see below), whose sum is σ = 151589543519232. Its totient is φ = 35617843866000.

The previous prime is 78881651555209. The next prime is 78881651555221. The reversal of 78881651555212 is 21255515618887.

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, 5936300668 + ... + 5936313955.

It is an arithmetic number, because the mean of its divisors is an integer number (6316230979968).

Almost surely, 2^{78881651555212} is an apocalyptic number.

It is an amenable number.

78881651555212 is a deficient number, since it is larger than the sum of its proper divisors (72707891964020).

78881651555212 is a wasteful number, since it uses less digits than its factorization.

78881651555212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11872614789 (or 11872614787 counting only the distinct ones).

The product of its digits is 53760000, while the sum is 64.

The spelling of 78881651555212 in words is "seventy-eight trillion, eight hundred eighty-one billion, six hundred fifty-one million, five hundred fifty-five thousand, two hundred twelve".