16325117538 has 16 divisors (see below), whose sum is σ = 32710593216. Its totient is φ = 5431646160.

The previous prime is 16325117519. The next prime is 16325117539. The reversal of 16325117538 is 83571152361.

It is a self number, because there is not a number n which added to its sum of digits gives 16325117538.

It is not an unprimeable number, because it can be changed into a prime (16325117539) 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, 2511406 + ... + 2517897.

It is an arithmetic number, because the mean of its divisors is an integer number (2044412076).

Almost surely, 2^16325117538 is an apocalyptic number.

16325117538 is an abundant number, since it is smaller than the sum of its proper divisors (16385475678).

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

16325117538 is a wasteful number, since it uses less digits than its factorization.

16325117538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5029849.

The product of its digits is 151200, while the sum is 42.

Adding to 16325117538 its reverse (83571152361), we get a palindrome (99896269899).

The spelling of 16325117538 in words is "sixteen billion, three hundred twenty-five million, one hundred seventeen thousand, five hundred thirty-eight".