78089280972867 has 24 divisors (see below), whose sum is σ = 119449554788304. Its totient is φ = 48989446255104.

The previous prime is 78089280972853. The next prime is 78089280972869. The reversal of 78089280972867 is 76827908298087.

It is not a de Polignac number, because 78089280972867 - 2⁶ = 78089280972803 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78089280972869) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39392178 + ... + 41327015.

It is an arithmetic number, because the mean of its divisors is an integer number (4977064782846).

Almost surely, 2^{78089280972867} is an apocalyptic number.

78089280972867 is a deficient number, since it is larger than the sum of its proper divisors (41360273815437).

78089280972867 is a wasteful number, since it uses less digits than its factorization.

78089280972867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80725539 (or 80725536 counting only the distinct ones).

The product of its (nonzero) digits is 2731180032, while the sum is 81.

The spelling of 78089280972867 in words is "seventy-eight trillion, eighty-nine billion, two hundred eighty million, nine hundred seventy-two thousand, eight hundred sixty-seven".