78973388337987 has 72 divisors (see below), whose sum is σ = 135929584640304. Its totient is φ = 43558646544000.

The previous prime is 78973388337971. The next prime is 78973388337997.

78973388337987 is a `hidden beast` number, since 7 + 8 + 97 + 33 + 88 + 337 + 9 + 87 = 666.

78973388337987 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 78973388337987 - 2⁴ = 78973388337971 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78973388337897 and 78973388337906.

It is not an unprimeable number, because it can be changed into a prime (78973388337997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 401437 + ... + 12574097.

It is an arithmetic number, because the mean of its divisors is an integer number (1887910897782).

Almost surely, 2^{78973388337987} is an apocalyptic number.

78973388337987 is a deficient number, since it is larger than the sum of its proper divisors (56956196302317).

78973388337987 is a wasteful number, since it uses less digits than its factorization.

78973388337987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12172833 (or 12172759 counting only the distinct ones).

The product of its digits is 64524128256, while the sum is 90.

The spelling of 78973388337987 in words is "seventy-eight trillion, nine hundred seventy-three billion, three hundred eighty-eight million, three hundred thirty-seven thousand, nine hundred eighty-seven".