61105600505 has 4 divisors (see below), whose sum is σ = 73326720612. Its totient is φ = 48884480400.

The previous prime is 61105600477. The next prime is 61105600537. The reversal of 61105600505 is 50500650116.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32619249664 + 28486350841 = 180608^2 + 168779^2 .

It is not a de Polignac number, because 61105600505 - 2⁶ = 61105600441 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6110560046 + ... + 6110560055.

It is an arithmetic number, because the mean of its divisors is an integer number (18331680153).

Almost surely, 2^61105600505 is an apocalyptic number.

It is an amenable number.

61105600505 is a deficient number, since it is larger than the sum of its proper divisors (12221120107).

61105600505 is a wasteful number, since it uses less digits than its factorization.

61105600505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12221120106.

The product of its (nonzero) digits is 4500, while the sum is 29.

The spelling of 61105600505 in words is "sixty-one billion, one hundred five million, six hundred thousand, five hundred five".