61877564 has 12 divisors (see below), whose sum is σ = 123755184. Its totient is φ = 26518944.

The previous prime is 61877531. The next prime is 61877573. The reversal of 61877564 is 46577816.

61877564 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

61877564 is an admirable number.

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 3 ways as a sum of consecutive naturals, for example, 1104929 + ... + 1104984.

It is an arithmetic number, because the mean of its divisors is an integer number (10312932).

Almost surely, 2^61877564 is an apocalyptic number.

It is an amenable number.

61877564 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.

61877564 is a wasteful number, since it uses less digits than its factorization.

61877564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2209924 (or 2209922 counting only the distinct ones).

The product of its digits is 282240, while the sum is 44.

The square root of 61877564 is about 7866.2293381264. The cubic root of 61877564 is about 395.5284578757.

The spelling of 61877564 in words is "sixty-one million, eight hundred seventy-seven thousand, five hundred sixty-four".