9939867281742 has 64 divisors (see below), whose sum is σ = 20770749518400. Its totient is φ = 3167075788800.

The previous prime is 9939867281741. The next prime is 9939867281803. The reversal of 9939867281742 is 2471827689399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9939867281741) by changing a digit.

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 in 31 ways as a sum of consecutive naturals, for example, 279215488 + ... + 279251084.

It is an arithmetic number, because the mean of its divisors is an integer number (324542961225).

Almost surely, 2^{9939867281742} is an apocalyptic number.

9939867281742 is an abundant number, since it is smaller than the sum of its proper divisors (10830882236658).

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

9939867281742 is a wasteful number, since it uses less digits than its factorization.

9939867281742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51621.

The product of its digits is 658409472, while the sum is 75.

It can be divided in two parts, 993986 and 7281742, that added together give a palindrome (8275728).

The spelling of 9939867281742 in words is "nine trillion, nine hundred thirty-nine billion, eight hundred sixty-seven million, two hundred eighty-one thousand, seven hundred forty-two".