61641867 has 8 divisors (see below), whose sum is σ = 93930496. Its totient is φ = 35223912.

The previous prime is 61641821. The next prime is 61641887. The reversal of 61641867 is 76814616.

It is a happy number.

61641867 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61641867 - 2⁷ = 61641739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61641887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1467643 + ... + 1467684.

It is an arithmetic number, because the mean of its divisors is an integer number (11741312).

Almost surely, 2^61641867 is an apocalyptic number.

61641867 is a deficient number, since it is larger than the sum of its proper divisors (32288629).

61641867 is a wasteful number, since it uses less digits than its factorization.

61641867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2935337.

The product of its digits is 48384, while the sum is 39.

The square root of 61641867 is about 7851.2334699715. The cubic root of 61641867 is about 395.0256181644.

The spelling of 61641867 in words is "sixty-one million, six hundred forty-one thousand, eight hundred sixty-seven".