55005550013 has 4 divisors (see below), whose sum is σ = 58241170620. Its totient is φ = 51769929408.

The previous prime is 55005550003. The next prime is 55005550063. The reversal of 55005550013 is 31005550055.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31005550055 = 5 ⋅6201110011.

It can be written as a sum of positive squares in 2 ways, for example, as 17624421049 + 37381128964 = 132757^2 + 193342^2 .

It is a cyclic number.

It is not a de Polignac number, because 55005550013 - 2⁸ = 55005549757 is a prime.

It is a super-2 number, since 2×55005550013² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55005550003) 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, 1617810278 + ... + 1617810311.

It is an arithmetic number, because the mean of its divisors is an integer number (14560292655).

Almost surely, 2^55005550013 is an apocalyptic number.

It is an amenable number.

55005550013 is a deficient number, since it is larger than the sum of its proper divisors (3235620607).

55005550013 is a wasteful number, since it uses less digits than its factorization.

55005550013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3235620606.

The product of its (nonzero) digits is 9375, while the sum is 29.

The spelling of 55005550013 in words is "fifty-five billion, five million, five hundred fifty thousand, thirteen".