61155644 has 24 divisors (see below), whose sum is σ = 117481728. Its totient is φ = 27624240.

The previous prime is 61155631. The next prime is 61155667. The reversal of 61155644 is 44655116.

61155644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 61155644.

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 7 ways as a sum of consecutive naturals, for example, 2909 + ... + 11435.

It is an arithmetic number, because the mean of its divisors is an integer number (4895072).

Almost surely, 2^61155644 is an apocalyptic number.

It is an amenable number.

61155644 is a deficient number, since it is larger than the sum of its proper divisors (56326084).

61155644 is a wasteful number, since it uses less digits than its factorization.

61155644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8705 (or 8703 counting only the distinct ones).

The product of its digits is 14400, while the sum is 32.

The square root of 61155644 is about 7820.2074141291. The cubic root of 61155644 is about 393.9842384206.

The spelling of 61155644 in words is "sixty-one million, one hundred fifty-five thousand, six hundred forty-four".