55645507449 has 81 divisors (see below), whose sum is σ = 95932658757. Its totient is φ = 30990678768.

The previous prime is 55645507441. The next prime is 55645507451. The reversal of 55645507449 is 94470554655.

The square root of 55645507449 is 235893.

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

55645507449 is a `hidden beast` number, since 5 + 56 + 45 + 507 + 4 + 49 = 666.

It is not a de Polignac number, because 55645507449 - 2³ = 55645507441 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 55645507395 and 55645507404.

It is not an unprimeable number, because it can be changed into a prime (55645507441) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 232826272 + ... + 232826510.

Almost surely, 2^55645507449 is an apocalyptic number.

55645507449 is the 235893-rd square number.

55645507449 is the 117947-th centered octagonal number.

It is an amenable number.

55645507449 is a deficient number, since it is larger than the sum of its proper divisors (40287151308).

55645507449 is an equidigital number, since it uses as much as digits as its factorization.

55645507449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592 (or 296 counting only the distinct ones).

The product of its (nonzero) digits is 15120000, while the sum is 54.

The spelling of 55645507449 in words is "fifty-five billion, six hundred forty-five million, five hundred seven thousand, four hundred forty-nine".