61544448 has 240 divisors, whose sum is σ = 214053840. Its totient is φ = 17252352.

The previous prime is 61544423. The next prime is 61544449. The reversal of 61544448 is 84444516.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61544449) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1161190 + ... + 1161242.

It is an arithmetic number, because the mean of its divisors is an integer number (891891).

Almost surely, 2^61544448 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 61544448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107026920).

61544448 is an abundant number, since it is smaller than the sum of its proper divisors (152509392).

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

61544448 is an equidigital number, since it uses as much as digits as its factorization.

61544448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94 (or 65 counting only the distinct ones).

The product of its digits is 61440, while the sum is 36.

The square root of 61544448 is about 7845.0269598007. The cubic root of 61544448 is about 394.8174085320.

The spelling of 61544448 in words is "sixty-one million, five hundred forty-four thousand, four hundred forty-eight".