16140450523 has 4 divisors (see below), whose sum is σ = 16141919760. Its totient is φ = 16138981288.

The previous prime is 16140450503. The next prime is 16140450563. The reversal of 16140450523 is 32505404161.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16140450523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16140450503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 718015 + ... + 740152.

It is an arithmetic number, because the mean of its divisors is an integer number (4035479940).

Almost surely, 2^16140450523 is an apocalyptic number.

16140450523 is a deficient number, since it is larger than the sum of its proper divisors (1469237).

16140450523 is a wasteful number, since it uses less digits than its factorization.

16140450523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1469236.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 16140450523 its reverse (32505404161), we get a palindrome (48645854684).

The spelling of 16140450523 in words is "sixteen billion, one hundred forty million, four hundred fifty thousand, five hundred twenty-three".