16003133440 has 312 divisors, whose sum is σ = 45986501952. Its totient is φ = 5326110720.

The previous prime is 16003133437. The next prime is 16003133459. The reversal of 16003133440 is 4433130061.

It is a happy number.

It is a super-2 number, since 2×16003133440² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37130025 + ... + 37130455.

Almost surely, 2^16003133440 is an apocalyptic number.

16003133440 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 16003133440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22993250976).

16003133440 is an abundant number, since it is smaller than the sum of its proper divisors (29983368512).

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

16003133440 is an equidigital number, since it uses as much as digits as its factorization.

16003133440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511 (or 482 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

The spelling of 16003133440 in words is "sixteen billion, three million, one hundred thirty-three thousand, four hundred forty".