55445548013 has 4 divisors (see below), whose sum is σ = 55687668540. Its totient is φ = 55203427488.

The previous prime is 55445547961. The next prime is 55445548057. The reversal of 55445548013 is 31084554455.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31084554455 = 5 ⋅6216910891.

It can be written as a sum of positive squares in 2 ways, for example, as 53240024644 + 2205523369 = 230738^2 + 46963^2 .

It is a cyclic number.

It is not a de Polignac number, because 55445548013 - 2¹² = 55445543917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55445548073) 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, 121059920 + ... + 121060377.

It is an arithmetic number, because the mean of its divisors is an integer number (13921917135).

Almost surely, 2^55445548013 is an apocalyptic number.

It is an amenable number.

55445548013 is a deficient number, since it is larger than the sum of its proper divisors (242120527).

55445548013 is a wasteful number, since it uses less digits than its factorization.

55445548013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242120526.

The product of its (nonzero) digits is 960000, while the sum is 44.

The spelling of 55445548013 in words is "fifty-five billion, four hundred forty-five million, five hundred forty-eight thousand, thirteen".