61555384 has 16 divisors (see below), whose sum is σ = 125908920. Its totient is φ = 27979680.

The previous prime is 61555381. The next prime is 61555393. The reversal of 61555384 is 48355516.

61555384 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 (61555381) 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, 349659 + ... + 349834.

Almost surely, 2^61555384 is an apocalyptic number.

It is an amenable number.

61555384 is an abundant number, since it is smaller than the sum of its proper divisors (64353536).

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

61555384 is a wasteful number, since it uses less digits than its factorization.

61555384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699510 (or 699506 counting only the distinct ones).

The product of its digits is 72000, while the sum is 37.

The square root of 61555384 is about 7845.7239309066. The cubic root of 61555384 is about 394.8407925393.

The spelling of 61555384 in words is "sixty-one million, five hundred fifty-five thousand, three hundred eighty-four".