16615500516 has 60 divisors (see below), whose sum is σ = 43560955900. Its totient is φ = 5522592960.

The previous prime is 16615500479. The next prime is 16615500547. The reversal of 16615500516 is 61500551661.

It can be written as a sum of positive squares in 2 ways, for example, as 9458340516 + 7157160000 = 97254^2 + 84600^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 39606 + ... + 186546.

Almost surely, 2^16615500516 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16615500516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21780477950).

16615500516 is an abundant number, since it is smaller than the sum of its proper divisors (26945455384).

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

16615500516 is a wasteful number, since it uses less digits than its factorization.

16615500516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147306 (or 147295 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The spelling of 16615500516 in words is "sixteen billion, six hundred fifteen million, five hundred thousand, five hundred sixteen".