78985366358987 has 16 divisors (see below), whose sum is σ = 87019966773504. Its totient is φ = 71093134140000.

The previous prime is 78985366358981. The next prime is 78985366359017.

It is a happy number.

78985366358987 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 78985366358987 - 2³⁶ = 78916646882251 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78985366358896 and 78985366358905.

It is not an unprimeable number, because it can be changed into a prime (78985366358981) 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, 111844562 + ... + 112548552.

It is an arithmetic number, because the mean of its divisors is an integer number (5438747923344).

Almost surely, 2^{78985366358987} is an apocalyptic number.

78985366358987 is a deficient number, since it is larger than the sum of its proper divisors (8034600414517).

78985366358987 is a wasteful number, since it uses less digits than its factorization.

78985366358987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805090.

The product of its digits is 131681894400, while the sum is 92.

The spelling of 78985366358987 in words is "seventy-eight trillion, nine hundred eighty-five billion, three hundred sixty-six million, three hundred fifty-eight thousand, nine hundred eighty-seven".