15642433356 has 72 divisors (see below), whose sum is σ = 40583505984. Its totient is φ = 4650584640.

The previous prime is 15642433349. The next prime is 15642433369. The reversal of 15642433356 is 65333424651.

15642433356 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 23 ways as a sum of consecutive naturals, for example, 349695 + ... + 391881.

Almost surely, 2^15642433356 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15642433356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20291752992).

15642433356 is an abundant number, since it is smaller than the sum of its proper divisors (24941072628).

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

15642433356 is a wasteful number, since it uses less digits than its factorization.

15642433356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42311 (or 42256 counting only the distinct ones).

The product of its digits is 777600, while the sum is 42.

The spelling of 15642433356 in words is "fifteen billion, six hundred forty-two million, four hundred thirty-three thousand, three hundred fifty-six".