16909412520 has 1024 divisors, whose sum is σ = 74317824000. Its totient is φ = 2961100800.

The previous prime is 16909412519. The next prime is 16909412543. The reversal of 16909412520 is 2521490961.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 70750561 + ... + 70750799.

It is an arithmetic number, because the mean of its divisors is an integer number (72576000).

Almost surely, 2^16909412520 is an apocalyptic number.

16909412520 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 16909412520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37158912000).

16909412520 is an abundant number, since it is smaller than the sum of its proper divisors (57408411480).

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

16909412520 is a wasteful number, since it uses less digits than its factorization.

16909412520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334 (or 330 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 39.

The spelling of 16909412520 in words is "sixteen billion, nine hundred nine million, four hundred twelve thousand, five hundred twenty".