61641612 has 18 divisors (see below), whose sum is σ = 155816388. Its totient is φ = 20547192.

The previous prime is 61641611. The next prime is 61641637. The reversal of 61641612 is 21614616.

61641612 is a `hidden beast` number, since 6 + 1 + 6 + 41 + 612 = 666.

61641612 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (18).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (61641611) 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 5 ways as a sum of consecutive naturals, for example, 856098 + ... + 856169.

It is an arithmetic number, because the mean of its divisors is an integer number (8656466).

Almost surely, 2^61641612 is an apocalyptic number.

It is an amenable number.

61641612 is an abundant number, since it is smaller than the sum of its proper divisors (94174776).

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

61641612 is a wasteful number, since it uses less digits than its factorization.

61641612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1712277 (or 1712272 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 61641612 is about 7851.2172304682. The cubic root of 61641612 is about 395.0250734498.

It can be divided in two parts, 6164 and 1612, that added together give a 5-th power (7776 = 6⁵).

The spelling of 61641612 in words is "sixty-one million, six hundred forty-one thousand, six hundred twelve".