55038440807 has 4 divisors (see below), whose sum is σ = 62901075216. Its totient is φ = 47175806400.

The previous prime is 55038440789. The next prime is 55038440819. The reversal of 55038440807 is 70804483055.

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

It is a cyclic number.

It is not a de Polignac number, because 55038440807 - 2¹⁰ = 55038439783 is a prime.

It is a super-2 number, since 2×55038440807² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55038440837) 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, 3931317194 + ... + 3931317207.

It is an arithmetic number, because the mean of its divisors is an integer number (15725268804).

Almost surely, 2^55038440807 is an apocalyptic number.

55038440807 is a deficient number, since it is larger than the sum of its proper divisors (7862634409).

55038440807 is an equidigital number, since it uses as much as digits as its factorization.

55038440807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7862634408.

The product of its (nonzero) digits is 537600, while the sum is 44.

The spelling of 55038440807 in words is "fifty-five billion, thirty-eight million, four hundred forty thousand, eight hundred seven".