5611561505 has 16 divisors (see below), whose sum is σ = 7665439104. Its totient is φ = 3903694080.

The previous prime is 5611561469. The next prime is 5611561523. The reversal of 5611561505 is 5051651165.

5611561505 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 5611561505 - 2²⁸ = 5343126049 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2216744 + ... + 2219273.

It is an arithmetic number, because the mean of its divisors is an integer number (479089944).

Almost surely, 2^5611561505 is an apocalyptic number.

5611561505 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

5611561505 is a deficient number, since it is larger than the sum of its proper divisors (2053877599).

5611561505 is a wasteful number, since it uses less digits than its factorization.

5611561505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4436056.

The product of its (nonzero) digits is 22500, while the sum is 35.

The square root of 5611561505 is about 74910.3564602385. The cubic root of 5611561505 is about 1777.0292475425.

The spelling of 5611561505 in words is "five billion, six hundred eleven million, five hundred sixty-one thousand, five hundred five".