61641198 has 24 divisors (see below), whose sum is σ = 133860168. Its totient is φ = 20500272.

The previous prime is 61641197. The next prime is 61641199. The reversal of 61641198 is 89114616.

It is a happy number.

61641198 is a `hidden beast` number, since 6 + 1 + 641 + 1 + 9 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (61641197) and next prime (61641199).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61641197) 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, 4740 + ... + 12072.

It is an arithmetic number, because the mean of its divisors is an integer number (5577507).

Almost surely, 2^61641198 is an apocalyptic number.

61641198 is an abundant number, since it is smaller than the sum of its proper divisors (72218970).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61641198 is a wasteful number, since it uses less digits than its factorization.

61641198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7808 (or 7805 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 61641198 is about 7851.1908650854. The cubic root of 61641198 is about 395.0241890864.

It can be divided in two parts, 616 and 41198, that added together give a palindrome (41814).

The spelling of 61641198 in words is "sixty-one million, six hundred forty-one thousand, one hundred ninety-eight".