16516078540 has 48 divisors (see below), whose sum is σ = 37415724192. Its totient is φ = 6087799296.

The previous prime is 16516078511. The next prime is 16516078541. The reversal of 16516078540 is 4587061561.

It is not an unprimeable number, because it can be changed into a prime (16516078541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98512 + ... + 206728.

It is an arithmetic number, because the mean of its divisors is an integer number (779494254).

Almost surely, 2^16516078540 is an apocalyptic number.

16516078540 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 16516078540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18707862096).

16516078540 is an abundant number, since it is smaller than the sum of its proper divisors (20899645652).

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

16516078540 is a wasteful number, since it uses less digits than its factorization.

16516078540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108826 (or 108824 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 43.

The spelling of 16516078540 in words is "sixteen billion, five hundred sixteen million, seventy-eight thousand, five hundred forty".