78964446987 has 24 divisors (see below), whose sum is σ = 114572185728. Its totient is φ = 52406611200.

The previous prime is 78964446971. The next prime is 78964447039.

78964446987 is a `hidden beast` number, since 7 + 8 + 96 + 4 + 446 + 98 + 7 = 666.

78964446987 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 78964446987 - 2⁴ = 78964446971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78964446787) 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, 10196937 + ... + 10204677.

It is an arithmetic number, because the mean of its divisors is an integer number (4773841072).

Almost surely, 2^78964446987 is an apocalyptic number.

78964446987 is a deficient number, since it is larger than the sum of its proper divisors (35607738741).

78964446987 is a wasteful number, since it uses less digits than its factorization.

78964446987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12691 (or 12688 counting only the distinct ones).

The product of its digits is 585252864, while the sum is 72.

The spelling of 78964446987 in words is "seventy-eight billion, nine hundred sixty-four million, four hundred forty-six thousand, nine hundred eighty-seven".