55505155617 has 12 divisors (see below), whose sum is σ = 82340982100. Its totient is φ = 36003343968.

The previous prime is 55505155547. The next prime is 55505155631. The reversal of 55505155617 is 71655150555.

It can be written as a sum of positive squares in 2 ways, for example, as 31789463616 + 23715692001 = 178296^2 + 153999^2 .

It is not a de Polignac number, because 55505155617 - 2⁸ = 55505155361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55505159617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 83340742 + ... + 83341407.

Almost surely, 2^55505155617 is an apocalyptic number.

It is an amenable number.

55505155617 is a deficient number, since it is larger than the sum of its proper divisors (26835826483).

55505155617 is a wasteful number, since it uses less digits than its factorization.

55505155617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166682192 (or 166682189 counting only the distinct ones).

The product of its (nonzero) digits is 656250, while the sum is 45.

The spelling of 55505155617 in words is "fifty-five billion, five hundred five million, one hundred fifty-five thousand, six hundred seventeen".