16461355520 has 80 divisors (see below), whose sum is σ = 39690272160. Its totient is φ = 6547574784.

The previous prime is 16461355501. The next prime is 16461355541. The reversal of 16461355520 is 2555316461.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 440279 + ... + 476201.

It is an arithmetic number, because the mean of its divisors is an integer number (496128402).

Almost surely, 2^16461355520 is an apocalyptic number.

16461355520 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 16461355520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19845136080).

16461355520 is an abundant number, since it is smaller than the sum of its proper divisors (23228916640).

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

16461355520 is an equidigital number, since it uses as much as digits as its factorization.

16461355520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36125 (or 36109 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 38.

The spelling of 16461355520 in words is "sixteen billion, four hundred sixty-one million, three hundred fifty-five thousand, five hundred twenty".