611661201171 has 16 divisors (see below), whose sum is σ = 834659928960. Its totient is φ = 398221608960.

The previous prime is 611661201161. The next prime is 611661201191. The reversal of 611661201171 is 171102166116.

It is a happy number.

It is not a de Polignac number, because 611661201171 - 2⁵ = 611661201139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (611661201161) 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, 335251 + ... + 1155731.

It is an arithmetic number, because the mean of its divisors is an integer number (52166245560).

Almost surely, 2^611661201171 is an apocalyptic number.

611661201171 is a deficient number, since it is larger than the sum of its proper divisors (222998727789).

611661201171 is a wasteful number, since it uses less digits than its factorization.

611661201171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 826306.

The product of its (nonzero) digits is 3024, while the sum is 33.

Adding to 611661201171 its reverse (171102166116), we get a palindrome (782763367287).

The spelling of 611661201171 in words is "six hundred eleven billion, six hundred sixty-one million, two hundred one thousand, one hundred seventy-one".