61121646 has 24 divisors (see below), whose sum is σ = 136703424. Its totient is φ = 19716480.

The previous prime is 61121569. The next prime is 61121663. The reversal of 61121646 is 64612116.

61121646 is a `hidden beast` number, since 6 + 1 + 12 + 1 + 646 = 666.

61121646 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 54211 + ... + 55326.

It is an arithmetic number, because the mean of its divisors is an integer number (5695976).

Almost surely, 2^61121646 is an apocalyptic number.

61121646 is an abundant number, since it is smaller than the sum of its proper divisors (75581778).

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

61121646 is a wasteful number, since it uses less digits than its factorization.

61121646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109576 (or 109573 counting only the distinct ones).

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

The square root of 61121646 is about 7818.0333844260. The cubic root of 61121646 is about 393.9112162203.

The spelling of 61121646 in words is "sixty-one million, one hundred twenty-one thousand, six hundred forty-six".