14912561689 has 3 divisors (see below), whose sum is σ = 14912683807. Its totient is φ = 14912439572.

The previous prime is 14912561683. The next prime is 14912561693. The reversal of 14912561689 is 98616521941.

The square root of 14912561689 is 122117.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 13762809225 + 1149752464 = 117315^2 + 33908^2 .

It is not a de Polignac number, because 14912561689 - 2⁷ = 14912561561 is a prime.

It is a super-2 number, since 2×14912561689² (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 (14912561683) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 61059 + ... + 183175.

Almost surely, 2^14912561689 is an apocalyptic number.

14912561689 is the 122117-th square number.

14912561689 is the 61059-th centered octagonal number.

It is an amenable number.

14912561689 is a deficient number, since it is larger than the sum of its proper divisors (122118).

14912561689 is an frugal number, since it uses more digits than its factorization.

14912561689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244234 (or 122117 counting only the distinct ones).

The product of its digits is 933120, while the sum is 52.

The spelling of 14912561689 in words is "fourteen billion, nine hundred twelve million, five hundred sixty-one thousand, six hundred eighty-nine".