55505055549 has 4 divisors (see below), whose sum is σ = 74006740736. Its totient is φ = 37003370364.

The previous prime is 55505055533. The next prime is 55505055581. The reversal of 55505055549 is 94555050555.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 55505055549 - 2⁴ = 55505055533 is a prime.

It is a super-2 number, since 2×55505055549² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 55505055498 and 55505055507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55505055349) 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, 9250842589 + ... + 9250842594.

It is an arithmetic number, because the mean of its divisors is an integer number (18501685184).

Almost surely, 2^55505055549 is an apocalyptic number.

It is an amenable number.

55505055549 is a deficient number, since it is larger than the sum of its proper divisors (18501685187).

55505055549 is a wasteful number, since it uses less digits than its factorization.

55505055549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18501685186.

The product of its (nonzero) digits is 2812500, while the sum is 48.

The spelling of 55505055549 in words is "fifty-five billion, five hundred five million, fifty-five thousand, five hundred forty-nine".