55649281801 has 3 divisors (see below), whose sum is σ = 55649517703. Its totient is φ = 55649045900.

The previous prime is 55649281783. The next prime is 55649281829. The reversal of 55649281801 is 10818294655.

The square root of 55649281801 is 235901.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 55013233401 + 636048400 = 234549^2 + 25220^2 .

It is a de Polignac number, because none of the positive numbers 2^k-55649281801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55649281841) 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 2 ways as a sum of consecutive naturals, for example, 117951 + ... + 353851.

Almost surely, 2^55649281801 is an apocalyptic number.

55649281801 is the 235901-st square number.

55649281801 is the 117951-st centered octagonal number.

It is an amenable number.

55649281801 is a deficient number, since it is larger than the sum of its proper divisors (235902).

55649281801 is an frugal number, since it uses more digits than its factorization.

55649281801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471802 (or 235901 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 49.

Multiplying 55649281801 by its sum of digits (49), we get a square (2726814808249 = 1651307²).

The spelling of 55649281801 in words is "fifty-five billion, six hundred forty-nine million, two hundred eighty-one thousand, eight hundred one".