9861039542 has 4 divisors (see below), whose sum is σ = 14791559316. Its totient is φ = 4930519770.

The previous prime is 9861039511. The next prime is 9861039583. The reversal of 9861039542 is 2459301689.

9861039542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2465259884 + ... + 2465259887.

It is an arithmetic number, because the mean of its divisors is an integer number (3697889829).

Almost surely, 2^9861039542 is an apocalyptic number.

9861039542 is a deficient number, since it is larger than the sum of its proper divisors (4930519774).

9861039542 is a wasteful number, since it uses less digits than its factorization.

9861039542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4930519773.

The product of its (nonzero) digits is 466560, while the sum is 47.

The square root of 9861039542 is about 99302.7670410045. The cubic root of 9861039542 is about 2144.4087308470.

The spelling of 9861039542 in words is "nine billion, eight hundred sixty-one million, thirty-nine thousand, five hundred forty-two".