61600111 has 2 divisors, whose sum is σ = 61600112. Its totient is φ = 61600110.

The previous prime is 61600087. The next prime is 61600117. The reversal of 61600111 is 11100616.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61600111 - 2²¹ = 59502959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61600117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30800055 + 30800056.

It is an arithmetic number, because the mean of its divisors is an integer number (30800056).

Almost surely, 2^61600111 is an apocalyptic number.

61600111 is a deficient number, since it is larger than the sum of its proper divisors (1).

61600111 is an equidigital number, since it uses as much as digits as its factorization.

61600111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 61600111 is about 7848.5738194910. The cubic root of 61600111 is about 394.9364016605.

Adding to 61600111 its reverse (11100616), we get a palindrome (72700727).

The spelling of 61600111 in words is "sixty-one million, six hundred thousand, one hundred eleven".