15943881442 has 8 divisors (see below), whose sum is σ = 23931888300. Its totient is φ = 7966585344.

The previous prime is 15943881433. The next prime is 15943881449. The reversal of 15943881442 is 24418834951.

15943881442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 15562812001 + 381069441 = 124751^2 + 19521^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (15943881449) 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 3 ways as a sum of consecutive naturals, for example, 2673967 + ... + 2679922.

Almost surely, 2^15943881442 is an apocalyptic number.

15943881442 is a deficient number, since it is larger than the sum of its proper divisors (7988006858).

15943881442 is a wasteful number, since it uses less digits than its factorization.

15943881442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5355380.

The product of its digits is 1105920, while the sum is 49.

The spelling of 15943881442 in words is "fifteen billion, nine hundred forty-three million, eight hundred eighty-one thousand, four hundred forty-two".