61455888 has 160 divisors (see below), whose sum is σ = 196654080. Its totient is φ = 18247680.

The previous prime is 61455887. The next prime is 61455893. The reversal of 61455888 is 88855416.

61455888 is a `hidden beast` number, since 6 + 14 + 558 + 88 = 666.

61455888 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 (61455883) 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 31 ways as a sum of consecutive naturals, for example, 173920 + ... + 174272.

It is an arithmetic number, because the mean of its divisors is an integer number (1229088).

Almost surely, 2^61455888 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61455888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98327040).

61455888 is an abundant number, since it is smaller than the sum of its proper divisors (135198192).

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

61455888 is a wasteful number, since it uses less digits than its factorization.

61455888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414 (or 402 counting only the distinct ones).

The product of its digits is 307200, while the sum is 45.

The square root of 61455888 is about 7839.3805877761. The cubic root of 61455888 is about 394.6279421363.

The spelling of 61455888 in words is "sixty-one million, four hundred fifty-five thousand, eight hundred eighty-eight".