15643268042 has 8 divisors (see below), whose sum is σ = 23697228132. Its totient is φ = 7744192000.

The previous prime is 15643267993. The next prime is 15643268051. The reversal of 15643268042 is 24086234651.

15643268042 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 14556181201 + 1087086841 = 120649^2 + 32971^2 .

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

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 in 3 ways as a sum of consecutive naturals, for example, 38720759 + ... + 38721162.

Almost surely, 2^15643268042 is an apocalyptic number.

15643268042 is a deficient number, since it is larger than the sum of its proper divisors (8053960090).

15643268042 is a wasteful number, since it uses less digits than its factorization.

15643268042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77442024.

The product of its (nonzero) digits is 276480, while the sum is 41.

The spelling of 15643268042 in words is "fifteen billion, six hundred forty-three million, two hundred sixty-eight thousand, forty-two".