78611668047 has 96 divisors (see below), whose sum is σ = 136094112000. Its totient is φ = 44685432000.

The previous prime is 78611668033. The next prime is 78611668063. The reversal of 78611668047 is 74086611687.

It is not a de Polignac number, because 78611668047 - 2¹² = 78611663951 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78611667984 and 78611668002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78611668067) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6263104 + ... + 6275642.

It is an arithmetic number, because the mean of its divisors is an integer number (1417647000).

Almost surely, 2^78611668047 is an apocalyptic number.

78611668047 is a deficient number, since it is larger than the sum of its proper divisors (57482443953).

78611668047 is a wasteful number, since it uses less digits than its factorization.

78611668047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12690 (or 12673 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 54.

The spelling of 78611668047 in words is "seventy-eight billion, six hundred eleven million, six hundred sixty-eight thousand, forty-seven".