15401554609 has 9 divisors (see below), whose sum is σ = 17917104747. Its totient is φ = 13200587904.

The previous prime is 15401554601. The next prime is 15401554657. The reversal of 15401554609 is 90645510451.

It is a happy number.

The square root of 15401554609 is 124103.

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

It can be written as a sum of positive squares in only one way, i.e., 10343500209 + 5058054400 = 101703^2 + 71120^2 .

It is not a de Polignac number, because 15401554609 - 2³ = 15401554601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15401554601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 859857 + ... + 877585.

Almost surely, 2^15401554609 is an apocalyptic number.

15401554609 is the 124103-rd square number.

15401554609 is the 62052-nd centered octagonal number.

It is an amenable number.

15401554609 is a deficient number, since it is larger than the sum of its proper divisors (2515550138).

15401554609 is an frugal number, since it uses more digits than its factorization.

15401554609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35472 (or 17736 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 40.

The spelling of 15401554609 in words is "fifteen billion, four hundred one million, five hundred fifty-four thousand, six hundred nine".