16516640530 has 128 divisors (see below), whose sum is σ = 36652331520. Its totient is φ = 5290168320.

The previous prime is 16516640507. The next prime is 16516640533. The reversal of 16516640530 is 3504661561.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a self number, because there is not a number n which added to its sum of digits gives 16516640530.

It is not an unprimeable number, because it can be changed into a prime (16516640533) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1548315 + ... + 1558945.

It is an arithmetic number, because the mean of its divisors is an integer number (286346340).

Almost surely, 2^16516640530 is an apocalyptic number.

16516640530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16516640530 is an abundant number, since it is smaller than the sum of its proper divisors (20135690990).

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

16516640530 is a wasteful number, since it uses less digits than its factorization.

16516640530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10724.

The product of its (nonzero) digits is 64800, while the sum is 37.

The spelling of 16516640530 in words is "sixteen billion, five hundred sixteen million, six hundred forty thousand, five hundred thirty".