78974711747987 has 16 divisors (see below), whose sum is σ = 86399867462400. Its totient is φ = 71590521620640.

The previous prime is 78974711747977. The next prime is 78974711748001.

78974711747987 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 78974711747987 - 2¹⁴ = 78974711731603 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78974711747899 and 78974711747908.

It is not an unprimeable number, because it can be changed into a prime (78974711747927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60432689 + ... + 61725677.

It is an arithmetic number, because the mean of its divisors is an integer number (5399991716400).

Almost surely, 2^{78974711747987} is an apocalyptic number.

78974711747987 is a deficient number, since it is larger than the sum of its proper divisors (7425155714413).

78974711747987 is a wasteful number, since it uses less digits than its factorization.

78974711747987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1308826.

The product of its digits is 9758278656, while the sum is 86.

The spelling of 78974711747987 in words is "seventy-eight trillion, nine hundred seventy-four billion, seven hundred eleven million, seven hundred forty-seven thousand, nine hundred eighty-seven".