9981308742 has 16 divisors (see below), whose sum is σ = 19964016192. Its totient is φ = 3326869800.

The previous prime is 9981308707. The next prime is 9981308747. The reversal of 9981308742 is 2478031899.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9981308747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49953 + ... + 149859.

It is an arithmetic number, because the mean of its divisors is an integer number (1247751012).

Almost surely, 2^9981308742 is an apocalyptic number.

It is a pronic number, being equal to 99906×99907.

9981308742 is an abundant number, since it is smaller than the sum of its proper divisors (9982707450).

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

9981308742 is a wasteful number, since it uses less digits than its factorization.

9981308742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116563.

The product of its (nonzero) digits is 870912, while the sum is 51.

The square root of 9981308742 is about 99906.4999987488. The cubic root of 9981308742 is about 2153.0915496967.

The spelling of 9981308742 in words is "nine billion, nine hundred eighty-one million, three hundred eight thousand, seven hundred forty-two".