14640518531 has 4 divisors (see below), whose sum is σ = 14659859472. Its totient is φ = 14621177592.

The previous prime is 14640518527. The next prime is 14640518539. The reversal of 14640518531 is 13581504641.

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

It is a cyclic number.

It is not a de Polignac number, because 14640518531 - 2² = 14640518527 is a prime.

It is a super-2 number, since 2×14640518531² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (14640518539) 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, 9669335 + ... + 9670848.

It is an arithmetic number, because the mean of its divisors is an integer number (3664964868).

Almost surely, 2^14640518531 is an apocalyptic number.

14640518531 is a deficient number, since it is larger than the sum of its proper divisors (19340941).

14640518531 is an equidigital number, since it uses as much as digits as its factorization.

14640518531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19340940.

The product of its (nonzero) digits is 57600, while the sum is 38.

The spelling of 14640518531 in words is "fourteen billion, six hundred forty million, five hundred eighteen thousand, five hundred thirty-one".