61325280 has 144 divisors (see below), whose sum is σ = 215115264. Its totient is φ = 15897600.

The previous prime is 61325269. The next prime is 61325309. The reversal of 61325280 is 8252316.

61325280 is a `hidden beast` number, since 6 + 132 + 528 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52705 + ... + 53855.

It is an arithmetic number, because the mean of its divisors is an integer number (1493856).

Almost surely, 2^61325280 is an apocalyptic number.

61325280 is a gapful number since it is divisible by the number (60) 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 61325280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107557632).

61325280 is an abundant number, since it is smaller than the sum of its proper divisors (153789984).

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

61325280 is a wasteful number, since it uses less digits than its factorization.

61325280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1209 (or 1198 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 61325280 is about 7831.0459071570. The cubic root of 61325280 is about 394.3481852586.

Adding to 61325280 its reverse (8252316), we get a palindrome (69577596).

The spelling of 61325280 in words is "sixty-one million, three hundred twenty-five thousand, two hundred eighty".