61641210111 has 16 divisors (see below), whose sum is σ = 89386802400. Its totient is φ = 37557475200.

The previous prime is 61641210049. The next prime is 61641210131. The reversal of 61641210111 is 11101214616.

It is not a de Polignac number, because 61641210111 - 2⁷ = 61641209983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61641210131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7820536 + ... + 7828413.

It is an arithmetic number, because the mean of its divisors is an integer number (5586675150).

Almost surely, 2^61641210111 is an apocalyptic number.

61641210111 is a deficient number, since it is larger than the sum of its proper divisors (27745592289).

61641210111 is a wasteful number, since it uses less digits than its factorization.

61641210111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15649066.

The product of its (nonzero) digits is 288, while the sum is 24.

Adding to 61641210111 its reverse (11101214616), we get a palindrome (72742424727).

The spelling of 61641210111 in words is "sixty-one billion, six hundred forty-one million, two hundred ten thousand, one hundred eleven".