61105601005 has 4 divisors (see below), whose sum is σ = 73326721212. Its totient is φ = 48884480800.

The previous prime is 61105600999. The next prime is 61105601009. The reversal of 61105601005 is 50010650116.

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 37336287076 + 23769313929 = 193226^2 + 154173^2 .

It is not a de Polignac number, because 61105601005 - 2⁷ = 61105600877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61105601009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6110560096 + ... + 6110560105.

It is an arithmetic number, because the mean of its divisors is an integer number (18331680303).

Almost surely, 2^61105601005 is an apocalyptic number.

It is an amenable number.

61105601005 is a deficient number, since it is larger than the sum of its proper divisors (12221120207).

61105601005 is a wasteful number, since it uses less digits than its factorization.

61105601005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12221120206.

The product of its (nonzero) digits is 900, while the sum is 25.

The spelling of 61105601005 in words is "sixty-one billion, one hundred five million, six hundred one thousand, five".