61005105011 has 4 divisors (see below), whose sum is σ = 61321193832. Its totient is φ = 60689016192.

The previous prime is 61005104947. The next prime is 61005105017. The reversal of 61005105011 is 11050150016.

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

It is a cyclic number.

It is not a de Polignac number, because 61005105011 - 2⁶ = 61005104947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61005105017) 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, 158044121 + ... + 158044506.

It is an arithmetic number, because the mean of its divisors is an integer number (15330298458).

Almost surely, 2^61005105011 is an apocalyptic number.

61005105011 is a deficient number, since it is larger than the sum of its proper divisors (316088821).

61005105011 is a wasteful number, since it uses less digits than its factorization.

61005105011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316088820.

The product of its (nonzero) digits is 150, while the sum is 20.

Adding to 61005105011 its reverse (11050150016), we get a palindrome (72055255027).

The spelling of 61005105011 in words is "sixty-one billion, five million, one hundred five thousand, eleven".