15349475449 has 27 divisors (see below), whose sum is σ = 19638512271. Its totient is φ = 11953196640.

The previous prime is 15349475447. The next prime is 15349475461. The reversal of 15349475449 is 94457494351.

The square root of 15349475449 is 123893.

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., 15007965049 + 341510400 = 122507^2 + 18480^2 .

It is not a de Polignac number, because 15349475449 - 2¹ = 15349475447 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15349475449.

It is not an unprimeable number, because it can be changed into a prime (15349475447) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 9538957 + ... + 9540565.

Almost surely, 2^15349475449 is an apocalyptic number.

15349475449 is the 123893-rd square number.

15349475449 is the 61947-th centered octagonal number.

It is an amenable number.

15349475449 is a deficient number, since it is larger than the sum of its proper divisors (4289036822).

15349475449 is an frugal number, since it uses more digits than its factorization.

15349475449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3254 (or 1627 counting only the distinct ones).

The product of its digits is 10886400, while the sum is 55.

The spelling of 15349475449 in words is "fifteen billion, three hundred forty-nine million, four hundred seventy-five thousand, four hundred forty-nine".