53873659449 has 9 divisors (see below), whose sum is σ = 77818513903. Its totient is φ = 35915308752.

The previous prime is 53873659429. The next prime is 53873659451. The reversal of 53873659449 is 94495637835.

The square root of 53873659449 is 232107.

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

53873659449 is a `hidden beast` number, since 5 + 3 + 8 + 7 + 36 + 594 + 4 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 401721849 + 53471937600 = 20043^2 + 231240^2 .

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

It is not a de Polignac number, because 53873659449 - 2⁵ = 53873659417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53873659409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 657637 + ... + 735005.

Almost surely, 2^53873659449 is an apocalyptic number.

53873659449 is the 232107-th square number.

53873659449 is the 116054-th centered octagonal number.

It is an amenable number.

53873659449 is a deficient number, since it is larger than the sum of its proper divisors (23944854454).

53873659449 is an frugal number, since it uses more digits than its factorization.

53873659449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154744 (or 77372 counting only the distinct ones).

The product of its digits is 97977600, while the sum is 63.

The spelling of 53873659449 in words is "fifty-three billion, eight hundred seventy-three million, six hundred fifty-nine thousand, four hundred forty-nine".