55500555055549 has 4 divisors (see below), whose sum is σ = 55529031483900. Its totient is φ = 55472078627200.

The previous prime is 55500555055499. The next prime is 55500555055571. The reversal of 55500555055549 is 94555055500555.

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 21762057060324 + 33738497995225 = 4664982^2 + 5808485^2 .

It is a cyclic number.

It is not a de Polignac number, because 55500555055549 - 2²³ = 55500546666941 is a prime.

It is a super-2 number, since 2×55500555055549² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55500555055493 and 55500555055502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55500555055579) 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, 14238211252 + ... + 14238215149.

It is an arithmetic number, because the mean of its divisors is an integer number (13882257870975).

Almost surely, 2^{55500555055549} is an apocalyptic number.

It is an amenable number.

55500555055549 is a deficient number, since it is larger than the sum of its proper divisors (28476428351).

55500555055549 is a wasteful number, since it uses less digits than its factorization.

55500555055549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28476428350.

The product of its (nonzero) digits is 70312500, while the sum is 58.

The spelling of 55500555055549 in words is "fifty-five trillion, five hundred billion, five hundred fifty-five million, fifty-five thousand, five hundred forty-nine".