55266643565 has 24 divisors (see below), whose sum is σ = 77896765440. Its totient is φ = 37529176608.

The previous prime is 55266643513. The next prime is 55266643567. The reversal of 55266643565 is 56534666255.

It is not a de Polignac number, because 55266643565 - 2¹⁴ = 55266627181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55266643567) 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 23 ways as a sum of consecutive naturals, for example, 1069805 + ... + 1120274.

It is an arithmetic number, because the mean of its divisors is an integer number (3245698560).

Almost surely, 2^55266643565 is an apocalyptic number.

It is an amenable number.

55266643565 is a deficient number, since it is larger than the sum of its proper divisors (22630121875).

55266643565 is a wasteful number, since it uses less digits than its factorization.

55266643565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2190201 (or 2190194 counting only the distinct ones).

The product of its digits is 19440000, while the sum is 53.

The spelling of 55266643565 in words is "fifty-five billion, two hundred sixty-six million, six hundred forty-three thousand, five hundred sixty-five".