15464973097809 has 9 divisors (see below), whose sum is σ = 22338311515689. Its totient is φ = 10309974200100.

The previous prime is 15464973097789. The next prime is 15464973097813. The reversal of 15464973097809 is 90879037946451.

The square root of 15464973097809 is 3932553.

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

15464973097809 is a `hidden beast` number, since 1 + 5 + 46 + 497 + 3 + 0 + 97 + 8 + 0 + 9 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 15464973097809 - 2¹³ = 15464973089617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15464973097829) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 11142234 + ... + 12453084.

Almost surely, 2^{15464973097809} is an apocalyptic number.

15464973097809 is the 3932553-rd square number.

15464973097809 is the 1966277-th centered octagonal number.

It is an amenable number.

15464973097809 is a deficient number, since it is larger than the sum of its proper divisors (6873338417880).

15464973097809 is an frugal number, since it uses more digits than its factorization.

15464973097809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2621708 (or 1310854 counting only the distinct ones).

The product of its (nonzero) digits is 411505920, while the sum is 72.

The spelling of 15464973097809 in words is "fifteen trillion, four hundred sixty-four billion, nine hundred seventy-three million, ninety-seven thousand, eight hundred nine".