55644864281 has 4 divisors (see below), whose sum is σ = 55645518864. Its totient is φ = 55644209700.

The previous prime is 55644864271. The next prime is 55644864299. The reversal of 55644864281 is 18246844655.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55644864281 is a prime.

It is a super-2 number, since 2×55644864281² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55644864271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176675 + ... + 377496.

It is an arithmetic number, because the mean of its divisors is an integer number (13911379716).

Almost surely, 2^55644864281 is an apocalyptic number.

It is an amenable number.

55644864281 is a deficient number, since it is larger than the sum of its proper divisors (654583).

55644864281 is a wasteful number, since it uses less digits than its factorization.

55644864281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654582.

The product of its digits is 7372800, while the sum is 53.

The spelling of 55644864281 in words is "fifty-five billion, six hundred forty-four million, eight hundred sixty-four thousand, two hundred eighty-one".