61556120 has 32 divisors (see below), whose sum is σ = 140177520. Its totient is φ = 24324480.

The previous prime is 61556113. The next prime is 61556153. The reversal of 61556120 is 2165516.

61556120 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 61556120.

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, 5951 + ... + 12590.

Almost surely, 2^61556120 is an apocalyptic number.

It is an amenable number.

61556120 is an abundant number, since it is smaller than the sum of its proper divisors (78621400).

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

61556120 is a wasteful number, since it uses less digits than its factorization.

61556120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18635 (or 18631 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 61556120 is about 7845.7708352972. The cubic root of 61556120 is about 394.8423661989.

The spelling of 61556120 in words is "sixty-one million, five hundred fifty-six thousand, one hundred twenty".