61646312111 has 2 divisors, whose sum is σ = 61646312112. Its totient is φ = 61646312110.

The previous prime is 61646312093. The next prime is 61646312153. The reversal of 61646312111 is 11121364616.

61646312111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61646312111 - 2²² = 61642117807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61646312911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30823156055 + 30823156056.

It is an arithmetic number, because the mean of its divisors is an integer number (30823156056).

Almost surely, 2^61646312111 is an apocalyptic number.

61646312111 is a deficient number, since it is larger than the sum of its proper divisors (1).

61646312111 is an equidigital number, since it uses as much as digits as its factorization.

61646312111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 32.

Adding to 61646312111 its reverse (11121364616), we get a palindrome (72767676727).

The spelling of 61646312111 in words is "sixty-one billion, six hundred forty-six million, three hundred twelve thousand, one hundred eleven".