61481380 has 24 divisors (see below), whose sum is σ = 129467520. Its totient is φ = 24524640.

The previous prime is 61481327. The next prime is 61481389. The reversal of 61481380 is 8318416.

It is not an unprimeable number, because it can be changed into a prime (61481389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3525 + ... + 11635.

It is an arithmetic number, because the mean of its divisors is an integer number (5394480).

Almost surely, 2^61481380 is an apocalyptic number.

It is an amenable number.

61481380 is an abundant number, since it is smaller than the sum of its proper divisors (67986140).

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

61481380 is a wasteful number, since it uses less digits than its factorization.

61481380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8499 (or 8497 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 61481380 is about 7841.0063129677. The cubic root of 61481380 is about 394.6824986928.

Adding to 61481380 its reverse (8318416), we get a palindrome (69799796).

The spelling of 61481380 in words is "sixty-one million, four hundred eighty-one thousand, three hundred eighty".