55373518509 has 16 divisors (see below), whose sum is σ = 81096230400. Its totient is φ = 33452193456.

The previous prime is 55373518489. The next prime is 55373518511. The reversal of 55373518509 is 90581537355.

It is a happy number.

55373518509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55373518509 - 2¹⁶ = 55373452973 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55373514509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21117499 + ... + 21120120.

It is an arithmetic number, because the mean of its divisors is an integer number (5068514400).

Almost surely, 2^55373518509 is an apocalyptic number.

It is an amenable number.

55373518509 is a deficient number, since it is larger than the sum of its proper divisors (25722711891).

55373518509 is a wasteful number, since it uses less digits than its factorization.

55373518509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42237664.

The product of its (nonzero) digits is 2835000, while the sum is 51.

The spelling of 55373518509 in words is "fifty-five billion, three hundred seventy-three million, five hundred eighteen thousand, five hundred nine".