16620725115 has 24 divisors (see below), whose sum is σ = 28841090928. Its totient is φ = 8854591680.

The previous prime is 16620725081. The next prime is 16620725117. The reversal of 16620725115 is 51152702661.

16620725115 is a `hidden beast` number, since 1 + 6 + 620 + 7 + 25 + 1 + 1 + 5 = 666.

It is not a de Polignac number, because 16620725115 - 2¹⁰ = 16620724091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16620725115.

It is not an unprimeable number, because it can be changed into a prime (16620725117) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 162796 + ... + 244425.

It is an arithmetic number, because the mean of its divisors is an integer number (1201712122).

Almost surely, 2^16620725115 is an apocalyptic number.

16620725115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16620725115 is a deficient number, since it is larger than the sum of its proper divisors (12220365813).

16620725115 is a wasteful number, since it uses less digits than its factorization.

16620725115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408139 (or 408136 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The spelling of 16620725115 in words is "sixteen billion, six hundred twenty million, seven hundred twenty-five thousand, one hundred fifteen".