9978601194 has 64 divisors (see below), whose sum is σ = 22313491200. Its totient is φ = 3305447424.

The previous prime is 9978601181. The next prime is 9978601211. The reversal of 9978601194 is 4911068799.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 9978601194.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11643214 + ... + 11644070.

It is an arithmetic number, because the mean of its divisors is an integer number (348648300).

Almost surely, 2^9978601194 is an apocalyptic number.

9978601194 is an abundant number, since it is smaller than the sum of its proper divisors (12334890006).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9978601194 is a wasteful number, since it uses less digits than its factorization.

9978601194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1964 (or 1958 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 54.

The square root of 9978601194 is about 99892.9486700638. The cubic root of 9978601194 is about 2152.8968482447.

The spelling of 9978601194 in words is "nine billion, nine hundred seventy-eight million, six hundred one thousand, one hundred ninety-four".