61156568 has 32 divisors (see below), whose sum is σ = 127224000. Its totient is φ = 27324960.

The previous prime is 61156561. The next prime is 61156619. The reversal of 61156568 is 86565116.

61156568 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 not an unprimeable number, because it can be changed into a prime (61156561) 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 7 ways as a sum of consecutive naturals, for example, 698 + ... + 11081.

It is an arithmetic number, because the mean of its divisors is an integer number (3975750).

Almost surely, 2^61156568 is an apocalyptic number.

It is an amenable number.

61156568 is an abundant number, since it is smaller than the sum of its proper divisors (66067432).

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

61156568 is a wasteful number, since it uses less digits than its factorization.

61156568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11855 (or 11851 counting only the distinct ones).

The product of its digits is 43200, while the sum is 38.

The square root of 61156568 is about 7820.2664916229. The cubic root of 61156568 is about 393.9862226452.

The spelling of 61156568 in words is "sixty-one million, one hundred fifty-six thousand, five hundred sixty-eight".