5505661551655 has 32 divisors (see below), whose sum is σ = 7137949915584. Its totient is φ = 4061213485056.

The previous prime is 5505661551601. The next prime is 5505661551659. The reversal of 5505661551655 is 5561551665055.

It is a cyclic number.

It is not a de Polignac number, because 5505661551655 - 2²⁹ = 5505124680743 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5505661551596 and 5505661551605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5505661551659) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2147284 + ... + 3952486.

It is an arithmetic number, because the mean of its divisors is an integer number (223060934862).

Almost surely, 2^{5505661551655} is an apocalyptic number.

5505661551655 is a deficient number, since it is larger than the sum of its proper divisors (1632288363929).

5505661551655 is a wasteful number, since it uses less digits than its factorization.

5505661551655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1805955.

The product of its (nonzero) digits is 16875000, while the sum is 55.

The spelling of 5505661551655 in words is "five trillion, five hundred five billion, six hundred sixty-one million, five hundred fifty-one thousand, six hundred fifty-five".