5561505065655 has 48 divisors (see below), whose sum is σ = 12018629136384. Its totient is φ = 2311274831040.

The previous prime is 5561505065647. The next prime is 5561505065671. The reversal of 5561505065655 is 5565605051655.

It is not a de Polignac number, because 5561505065655 - 2³ = 5561505065647 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 802522519 + ... + 802529448.

It is an arithmetic number, because the mean of its divisors is an integer number (250388107008).

Almost surely, 2^{5561505065655} is an apocalyptic number.

5561505065655 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

5561505065655 is an abundant number, since it is smaller than the sum of its proper divisors (6457124070729).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5561505065655 is a wasteful number, since it uses less digits than its factorization.

5561505065655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1605051996 (or 1605051993 counting only the distinct ones).

The product of its (nonzero) digits is 16875000, while the sum is 54.

The spelling of 5561505065655 in words is "five trillion, five hundred sixty-one billion, five hundred five million, sixty-five thousand, six hundred fifty-five".