61455408 has 240 divisors, whose sum is σ = 206102880. Its totient is φ = 15654912.

The previous prime is 61455377. The next prime is 61455413. The reversal of 61455408 is 80455416.

61455408 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 47 ways as a sum of consecutive naturals, for example, 1159510 + ... + 1159562.

It is an arithmetic number, because the mean of its divisors is an integer number (858762).

Almost surely, 2^61455408 is an apocalyptic number.

61455408 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61455408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103051440).

61455408 is an abundant number, since it is smaller than the sum of its proper divisors (144647472).

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

61455408 is a wasteful number, since it uses less digits than its factorization.

61455408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124 (or 111 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 33.

The square root of 61455408 is about 7839.3499730526. The cubic root of 61455408 is about 394.6269147224.

The spelling of 61455408 in words is "sixty-one million, four hundred fifty-five thousand, four hundred eight".