61641171 has 12 divisors (see below), whose sum is σ = 90497680. Its totient is φ = 40420080.

The previous prime is 61641157. The next prime is 61641197. The reversal of 61641171 is 17114616.

61641171 is a `hidden beast` number, since 6 + 1 + 641 + 17 + 1 = 666.

It is not a de Polignac number, because 61641171 - 2¹⁵ = 61608403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61641121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55591 + ... + 56688.

Almost surely, 2^61641171 is an apocalyptic number.

61641171 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

61641171 is a deficient number, since it is larger than the sum of its proper divisors (28856509).

61641171 is a wasteful number, since it uses less digits than its factorization.

61641171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112346 (or 112343 counting only the distinct ones).

The product of its digits is 1008, while the sum is 27.

The square root of 61641171 is about 7851.1891456008. The cubic root of 61641171 is about 395.0241314104.

Adding to 61641171 its reverse (17114616), we get a palindrome (78755787).

The spelling of 61641171 in words is "sixty-one million, six hundred forty-one thousand, one hundred seventy-one".