9534873978 has 24 divisors (see below), whose sum is σ = 23610164448. Its totient is φ = 2724249672.

The previous prime is 9534873977. The next prime is 9534873983. The reversal of 9534873978 is 8793784359.

9534873978 is a `hidden beast` number, since 9 + 53 + 487 + 39 + 78 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (9534873977) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37836676 + ... + 37836927.

It is an arithmetic number, because the mean of its divisors is an integer number (983756852).

Almost surely, 2^9534873978 is an apocalyptic number.

9534873978 is an abundant number, since it is smaller than the sum of its proper divisors (14075290470).

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

9534873978 is a wasteful number, since it uses less digits than its factorization.

9534873978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75673618 (or 75673615 counting only the distinct ones).

The product of its digits is 45722880, while the sum is 63.

The square root of 9534873978 is about 97646.6792983766. The cubic root of 9534873978 is about 2120.5002066691.

The spelling of 9534873978 in words is "nine billion, five hundred thirty-four million, eight hundred seventy-three thousand, nine hundred seventy-eight".