61320544 has 48 divisors (see below), whose sum is σ = 126001008. Its totient is φ = 29348352.

The previous prime is 61320541. The next prime is 61320551. The reversal of 61320544 is 44502316.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61320541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78942 + ... + 79714.

It is an arithmetic number, because the mean of its divisors is an integer number (2625021).

Almost surely, 2^61320544 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 61320544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63000504).

61320544 is an abundant number, since it is smaller than the sum of its proper divisors (64680464).

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

61320544 is a wasteful number, since it uses less digits than its factorization.

61320544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887 (or 879 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 61320544 is about 7830.7435151459. The cubic root of 61320544 is about 394.3380334850.

The spelling of 61320544 in words is "sixty-one million, three hundred twenty thousand, five hundred forty-four".