15825805420 has 48 divisors (see below), whose sum is σ = 33443020800. Its totient is φ = 6290617280.

The previous prime is 15825805399. The next prime is 15825805421. The reversal of 15825805420 is 2450852851.

15825805420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×15825805420² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15825805421) 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 15 ways as a sum of consecutive naturals, for example, 5495541 + ... + 5498419.

It is an arithmetic number, because the mean of its divisors is an integer number (696729600).

Almost surely, 2^15825805420 is an apocalyptic number.

15825805420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15825805420 is an abundant number, since it is smaller than the sum of its proper divisors (17617215380).

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

15825805420 is a wasteful number, since it uses less digits than its factorization.

15825805420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4518 (or 4516 counting only the distinct ones).

The product of its (nonzero) digits is 128000, while the sum is 40.

The spelling of 15825805420 in words is "fifteen billion, eight hundred twenty-five million, eight hundred five thousand, four hundred twenty".