9878722345 has 16 divisors (see below), whose sum is σ = 12486372480. Its totient is φ = 7482240000.

The previous prime is 9878722331. The next prime is 9878722369. The reversal of 9878722345 is 5432278789.

It is a happy number.

It is not a de Polignac number, because 9878722345 - 2¹⁵ = 9878689577 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119620 + ... + 184570.

It is an arithmetic number, because the mean of its divisors is an integer number (780398280).

Almost surely, 2^9878722345 is an apocalyptic number.

9878722345 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

9878722345 is a deficient number, since it is larger than the sum of its proper divisors (2607650135).

9878722345 is a wasteful number, since it uses less digits than its factorization.

9878722345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66576.

The product of its digits is 6773760, while the sum is 55.

The square root of 9878722345 is about 99391.7619574178. The cubic root of 9878722345 is about 2145.6897490738.

The spelling of 9878722345 in words is "nine billion, eight hundred seventy-eight million, seven hundred twenty-two thousand, three hundred forty-five".