61556144 has 20 divisors (see below), whose sum is σ = 128439696. Its totient is φ = 28410432.

The previous prime is 61556113. The next prime is 61556153. The reversal of 61556144 is 44165516.

61556144 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 61556144.

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 3 ways as a sum of consecutive naturals, for example, 147764 + ... + 148179.

Almost surely, 2^61556144 is an apocalyptic number.

It is an amenable number.

61556144 is an abundant number, since it is smaller than the sum of its proper divisors (66883552).

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

61556144 is a wasteful number, since it uses less digits than its factorization.

61556144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295964 (or 295958 counting only the distinct ones).

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

The square root of 61556144 is about 7845.7723647835. The cubic root of 61556144 is about 394.8424175137.

The spelling of 61556144 in words is "sixty-one million, five hundred fifty-six thousand, one hundred forty-four".