55626431645 has 8 divisors (see below), whose sum is σ = 66765673656. Its totient is φ = 44491841536.

The previous prime is 55626431639. The next prime is 55626431669. The reversal of 55626431645 is 54613462655.

It can be written as a sum of positive squares in 4 ways, for example, as 27253387396 + 28373044249 = 165086^2 + 168443^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55626431645 - 2¹⁰ = 55626430621 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55626431645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1136612 + ... + 1184541.

It is an arithmetic number, because the mean of its divisors is an integer number (8345709207).

Almost surely, 2^55626431645 is an apocalyptic number.

It is an amenable number.

55626431645 is a deficient number, since it is larger than the sum of its proper divisors (11139242011).

55626431645 is a wasteful number, since it uses less digits than its factorization.

55626431645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2325951.

The product of its digits is 2592000, while the sum is 47.

The spelling of 55626431645 in words is "fifty-five billion, six hundred twenty-six million, four hundred thirty-one thousand, six hundred forty-five".