16235653138 has 8 divisors (see below), whose sum is σ = 24494251788. Its totient is φ = 8070902544.

The previous prime is 16235653097. The next prime is 16235653139. The reversal of 16235653138 is 83135653261.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11298201849 + 4937451289 = 106293^2 + 70267^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 16235653094 and 16235653103.

It is not an unprimeable number, because it can be changed into a prime (16235653139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23461581 + ... + 23462272.

Almost surely, 2^16235653138 is an apocalyptic number.

16235653138 is a deficient number, since it is larger than the sum of its proper divisors (8258598650).

16235653138 is a wasteful number, since it uses less digits than its factorization.

16235653138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46924028.

The product of its digits is 388800, while the sum is 43.

The spelling of 16235653138 in words is "sixteen billion, two hundred thirty-five million, six hundred fifty-three thousand, one hundred thirty-eight".