61365556 has 12 divisors (see below), whose sum is σ = 122731168. Its totient is φ = 26299512.

The previous prime is 61365553. The next prime is 61365569. The reversal of 61365556 is 65556316.

It is a happy number.

61365556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

61365556 is an admirable number.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61365553) 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 3 ways as a sum of consecutive naturals, for example, 1095786 + ... + 1095841.

Almost surely, 2^61365556 is an apocalyptic number.

It is an amenable number.

61365556 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

61365556 is a wasteful number, since it uses less digits than its factorization.

61365556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2191638 (or 2191636 counting only the distinct ones).

The product of its digits is 81000, while the sum is 37.

The square root of 61365556 is about 7833.6170445076. The cubic root of 61365556 is about 394.4344970902.

The spelling of 61365556 in words is "sixty-one million, three hundred sixty-five thousand, five hundred fifty-six".