16618128513 has 8 divisors (see below), whose sum is σ = 25322862528. Its totient is φ = 9496073424.

The previous prime is 16618128511. The next prime is 16618128529. The reversal of 16618128513 is 31582181661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16618128513 - 2¹ = 16618128511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16618128511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 395669706 + ... + 395669747.

It is an arithmetic number, because the mean of its divisors is an integer number (3165357816).

Almost surely, 2^16618128513 is an apocalyptic number.

It is an amenable number.

16618128513 is a deficient number, since it is larger than the sum of its proper divisors (8704734015).

16618128513 is an equidigital number, since it uses as much as digits as its factorization.

16618128513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 791339463.

The product of its digits is 69120, while the sum is 42.

The spelling of 16618128513 in words is "sixteen billion, six hundred eighteen million, one hundred twenty-eight thousand, five hundred thirteen".