15463668609 has 45 divisors (see below), whose sum is σ = 23747673081. Its totient is φ = 10027825920.

The previous prime is 15463668599. The next prime is 15463668611. The reversal of 15463668609 is 90686636451.

The square root of 15463668609 is 124353.

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

15463668609 is a `hidden beast` number, since 1 + 546 + 36 + 6 + 8 + 60 + 9 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 8011145025 + 7452523584 = 89505^2 + 86328^2 .

It is not a de Polignac number, because 15463668609 - 2¹⁵ = 15463635841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15463678609) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 45886089 + ... + 45886425.

Almost surely, 2^15463668609 is an apocalyptic number.

15463668609 is the 124353-rd square number.

15463668609 is the 62177-th centered octagonal number.

It is an amenable number.

15463668609 is a deficient number, since it is larger than the sum of its proper divisors (8284004472).

15463668609 is an frugal number, since it uses more digits than its factorization.

15463668609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768 (or 381 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 54.

The spelling of 15463668609 in words is "fifteen billion, four hundred sixty-three million, six hundred sixty-eight thousand, six hundred nine".