9678956642 has 4 divisors (see below), whose sum is σ = 14518434966. Its totient is φ = 4839478320.

The previous prime is 9678956641. The next prime is 9678956657. The reversal of 9678956642 is 2466598769.

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

It can be written as a sum of positive squares in only one way, i.e., 5125271281 + 4553685361 = 71591^2 + 67481^2 .

It is not an unprimeable number, because it can be changed into a prime (9678956641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2419739159 + ... + 2419739162.

Almost surely, 2^9678956642 is an apocalyptic number.

9678956642 is a deficient number, since it is larger than the sum of its proper divisors (4839478324).

9678956642 is a wasteful number, since it uses less digits than its factorization.

9678956642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4839478323.

The product of its digits is 39191040, while the sum is 62.

The square root of 9678956642 is about 98381.6885502582. The cubic root of 9678956642 is about 2131.1279002160.

The spelling of 9678956642 in words is "nine billion, six hundred seventy-eight million, nine hundred fifty-six thousand, six hundred forty-two".