16465405320 has 576 divisors, whose sum is σ = 70584696000. Its totient is φ = 3290305536.

The previous prime is 16465405279. The next prime is 16465405321. The reversal of 16465405320 is 2350456461.

16465405320 is a `hidden beast` number, since 1 + 6 + 46 + 540 + 53 + 20 = 666.

It is a super-2 number, since 2×16465405320² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (16465405321) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 4355191 + ... + 4358969.

It is an arithmetic number, because the mean of its divisors is an integer number (122542875).

Almost surely, 2^16465405320 is an apocalyptic number.

16465405320 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 16465405320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35292348000).

16465405320 is an abundant number, since it is smaller than the sum of its proper divisors (54119290680).

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

16465405320 is a wasteful number, since it uses less digits than its factorization.

16465405320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3842 (or 3828 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The spelling of 16465405320 in words is "sixteen billion, four hundred sixty-five million, four hundred five thousand, three hundred twenty".