16404025540 has 96 divisors (see below), whose sum is σ = 40268067840. Its totient is φ = 5496259584.

The previous prime is 16404025507. The next prime is 16404025549. The reversal of 16404025540 is 4552040461.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (16404025549) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5637606 + ... + 5640514.

It is an arithmetic number, because the mean of its divisors is an integer number (419459040).

Almost surely, 2^16404025540 is an apocalyptic number.

16404025540 is a gapful number since it is divisible by the number (10) 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 16404025540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20134033920).

16404025540 is an abundant number, since it is smaller than the sum of its proper divisors (23864042300).

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

16404025540 is a wasteful number, since it uses less digits than its factorization.

16404025540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3829 (or 3827 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 31.

The spelling of 16404025540 in words is "sixteen billion, four hundred four million, twenty-five thousand, five hundred forty".