61609611 has 24 divisors (see below), whose sum is σ = 96920064. Its totient is φ = 34703760.

The previous prime is 61609589. The next prime is 61609619. The reversal of 61609611 is 11690616.

It is a happy number.

61609611 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61609611 - 2⁵ = 61609579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61609619) 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 23 ways as a sum of consecutive naturals, for example, 7486 + ... + 13388.

It is an arithmetic number, because the mean of its divisors is an integer number (4038336).

Almost surely, 2^61609611 is an apocalyptic number.

61609611 is a deficient number, since it is larger than the sum of its proper divisors (35310453).

61609611 is a wasteful number, since it uses less digits than its factorization.

61609611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5991 (or 5984 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 61609611 is about 7849.1790016536. The cubic root of 61609611 is about 394.9567030468.

The spelling of 61609611 in words is "sixty-one million, six hundred nine thousand, six hundred eleven".