9678964436439 has 4 divisors (see below), whose sum is σ = 12905285915256. Its totient is φ = 6452642957624.

The previous prime is 9678964436423. The next prime is 9678964436443. The reversal of 9678964436439 is 9346344698769.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9678964436439 - 2⁴ = 9678964436423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9678964416439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1613160739404 + ... + 1613160739409.

It is an arithmetic number, because the mean of its divisors is an integer number (3226321478814).

Almost surely, 2^{9678964436439} is an apocalyptic number.

9678964436439 is a deficient number, since it is larger than the sum of its proper divisors (3226321478817).

9678964436439 is a wasteful number, since it uses less digits than its factorization.

9678964436439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3226321478816.

The product of its digits is 5079158784, while the sum is 78.

The spelling of 9678964436439 in words is "nine trillion, six hundred seventy-eight billion, nine hundred sixty-four million, four hundred thirty-six thousand, four hundred thirty-nine".