16253602539 has 16 divisors (see below), whose sum is σ = 23087048832. Its totient is φ = 10135767168.

The previous prime is 16253602531. The next prime is 16253602549. The reversal of 16253602539 is 93520635261.

It is a happy number.

It is not a de Polignac number, because 16253602539 - 2³ = 16253602531 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16253602539.

It is not an unprimeable number, because it can be changed into a prime (16253602531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 969289 + ... + 985914.

It is an arithmetic number, because the mean of its divisors is an integer number (1442940552).

Almost surely, 2^16253602539 is an apocalyptic number.

16253602539 is a deficient number, since it is larger than the sum of its proper divisors (6833446293).

16253602539 is a wasteful number, since it uses less digits than its factorization.

16253602539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1955386.

The product of its (nonzero) digits is 291600, while the sum is 42.

The spelling of 16253602539 in words is "sixteen billion, two hundred fifty-three million, six hundred two thousand, five hundred thirty-nine".