61305542611 has 4 divisors (see below), whose sum is σ = 61340516152. Its totient is φ = 61270569072.

The previous prime is 61305542567. The next prime is 61305542651. The reversal of 61305542611 is 11624550316.

61305542611 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 61305542611 - 2⁷ = 61305542483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61305542651) 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, 17484141 + ... + 17487646.

It is an arithmetic number, because the mean of its divisors is an integer number (15335129038).

Almost surely, 2^61305542611 is an apocalyptic number.

61305542611 is a deficient number, since it is larger than the sum of its proper divisors (34973541).

61305542611 is a wasteful number, since it uses less digits than its factorization.

61305542611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34973540.

The product of its (nonzero) digits is 21600, while the sum is 34.

The spelling of 61305542611 in words is "sixty-one billion, three hundred five million, five hundred forty-two thousand, six hundred eleven".