15643135564 has 24 divisors (see below), whose sum is σ = 31563147168. Its totient is φ = 6644870400.

The previous prime is 15643135561. The next prime is 15643135621. The reversal of 15643135564 is 46553134651.

15643135564 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 15643135564.

It is not an unprimeable number, because it can be changed into a prime (15643135561) 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 7 ways as a sum of consecutive naturals, for example, 2468887 + ... + 2475214.

It is an arithmetic number, because the mean of its divisors is an integer number (1315131132).

Almost surely, 2^15643135564 is an apocalyptic number.

15643135564 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

15643135564 is an abundant number, since it is smaller than the sum of its proper divisors (15920011604).

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

15643135564 is a wasteful number, since it uses less digits than its factorization.

15643135564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4944225 (or 4944223 counting only the distinct ones).

The product of its digits is 648000, while the sum is 43.

The spelling of 15643135564 in words is "fifteen billion, six hundred forty-three million, one hundred thirty-five thousand, five hundred sixty-four".