9678541978 has 8 divisors (see below), whose sum is σ = 16591786272. Its totient is φ = 4147946556.

The previous prime is 9678541969. The next prime is 9678541987. The reversal of 9678541978 is 8791458769.

It is an interprime number because it is at equal distance from previous prime (9678541969) and next prime (9678541987).

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 345662200 + ... + 345662227.

It is an arithmetic number, because the mean of its divisors is an integer number (2073973284).

Almost surely, 2^9678541978 is an apocalyptic number.

9678541978 is a deficient number, since it is larger than the sum of its proper divisors (6913244294).

9678541978 is a wasteful number, since it uses less digits than its factorization.

9678541978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691324436.

The product of its digits is 30481920, while the sum is 64.

The square root of 9678541978 is about 98379.5811029911. The cubic root of 9678541978 is about 2131.0974659907.

The spelling of 9678541978 in words is "nine billion, six hundred seventy-eight million, five hundred forty-one thousand, nine hundred seventy-eight".