61811488 has 24 divisors (see below), whose sum is σ = 126983808. Its totient is φ = 29561664.

The previous prime is 61811471. The next prime is 61811537. The reversal of 61811488 is 88411816.

61811488 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 41256 + ... + 42727.

It is an arithmetic number, because the mean of its divisors is an integer number (5290992).

Almost surely, 2^61811488 is an apocalyptic number.

It is an amenable number.

61811488 is an abundant number, since it is smaller than the sum of its proper divisors (65172320).

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

61811488 is a wasteful number, since it uses less digits than its factorization.

61811488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84016 (or 84008 counting only the distinct ones).

The product of its digits is 12288, while the sum is 37.

The square root of 61811488 is about 7862.0282370391. The cubic root of 61811488 is about 395.3876192855.

The spelling of 61811488 in words is "sixty-one million, eight hundred eleven thousand, four hundred eighty-eight".