5561055661505 has 8 divisors (see below), whose sum is σ = 7065811899432. Its totient is φ = 4187147792128.

The previous prime is 5561055661451. The next prime is 5561055661519. The reversal of 5561055661505 is 5051665501655.

It can be written as a sum of positive squares in 4 ways, for example, as 1150522245376 + 4410533416129 = 1072624^2 + 2100127^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5561055661505 - 2¹⁴ = 5561055645121 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32712092042 + ... + 32712092211.

It is an arithmetic number, because the mean of its divisors is an integer number (883226487429).

Almost surely, 2^{5561055661505} is an apocalyptic number.

It is an amenable number.

5561055661505 is a deficient number, since it is larger than the sum of its proper divisors (1504756237927).

5561055661505 is a wasteful number, since it uses less digits than its factorization.

5561055661505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65424184275.

The product of its (nonzero) digits is 3375000, while the sum is 50.

The spelling of 5561055661505 in words is "five trillion, five hundred sixty-one billion, fifty-five million, six hundred sixty-one thousand, five hundred five".