15853959552 has 128 divisors (see below), whose sum is σ = 44932060800. Its totient is φ = 4935557120.

The previous prime is 15853959533. The next prime is 15853959559. The reversal of 15853959552 is 25595935851.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a junction number, because it is equal to n+sod(n) for n = 15853959492 and 15853959501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15853959559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 845899 + ... + 864437.

It is an arithmetic number, because the mean of its divisors is an integer number (351031725).

Almost surely, 2^15853959552 is an apocalyptic number.

15853959552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15853959552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22466030400).

15853959552 is an abundant number, since it is smaller than the sum of its proper divisors (29078101248).

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

15853959552 is a wasteful number, since it uses less digits than its factorization.

15853959552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18704 (or 18692 counting only the distinct ones).

The product of its digits is 12150000, while the sum is 57.

The spelling of 15853959552 in words is "fifteen billion, eight hundred fifty-three million, nine hundred fifty-nine thousand, five hundred fifty-two".