16565028480 has 1536 divisors, whose sum is σ = 81800409600. Its totient is φ = 2990407680.

The previous prime is 16565028461. The next prime is 16565028509. The reversal of 16565028480 is 8482056561.

16565028480 is a `hidden beast` number, since 1 + 6 + 565 + 0 + 2 + 8 + 4 + 80 = 666.

It is a super-2 number, since 2×16565028480² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 974413432 + ... + 974413448.

It is an arithmetic number, because the mean of its divisors is an integer number (53255475).

Almost surely, 2^16565028480 is an apocalyptic number.

16565028480 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 16565028480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40900204800).

16565028480 is an abundant number, since it is smaller than the sum of its proper divisors (65235381120).

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

16565028480 is a wasteful number, since it uses less digits than its factorization.

16565028480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99 (or 58 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 45.

The spelling of 16565028480 in words is "sixteen billion, five hundred sixty-five million, twenty-eight thousand, four hundred eighty".