16502136123 has 16 divisors (see below), whose sum is σ = 24651841536. Its totient is φ = 9730988640.

The previous prime is 16502136109. The next prime is 16502136151. The reversal of 16502136123 is 32163120561.

It is not a de Polignac number, because 16502136123 - 2¹⁰ = 16502135099 is a prime.

It is a super-2 number, since 2×16502136123² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16502136173) 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, 6756411 + ... + 6758852.

It is an arithmetic number, because the mean of its divisors is an integer number (1540740096).

Almost surely, 2^16502136123 is an apocalyptic number.

16502136123 is a deficient number, since it is larger than the sum of its proper divisors (8149705413).

16502136123 is a wasteful number, since it uses less digits than its factorization.

16502136123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13515314.

The product of its (nonzero) digits is 6480, while the sum is 30.

Adding to 16502136123 its reverse (32163120561), we get a palindrome (48665256684).

The spelling of 16502136123 in words is "sixteen billion, five hundred two million, one hundred thirty-six thousand, one hundred twenty-three".