55443700013 has 4 divisors (see below), whose sum is σ = 59708600028. Its totient is φ = 51178800000.

The previous prime is 55443700007. The next prime is 55443700027. The reversal of 55443700013 is 31000734455.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15218183044 + 40225516969 = 123362^2 + 200563^2 .

It is a cyclic number.

It is not a de Polignac number, because 55443700013 - 2¹² = 55443695917 is a prime.

It is a super-2 number, since 2×55443700013² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55443700033) 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, 2132449988 + ... + 2132450013.

It is an arithmetic number, because the mean of its divisors is an integer number (14927150007).

Almost surely, 2^55443700013 is an apocalyptic number.

It is an amenable number.

55443700013 is a deficient number, since it is larger than the sum of its proper divisors (4264900015).

55443700013 is a wasteful number, since it uses less digits than its factorization.

55443700013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4264900014.

The product of its (nonzero) digits is 25200, while the sum is 32.

The spelling of 55443700013 in words is "fifty-five billion, four hundred forty-three million, seven hundred thousand, thirteen".