61361320 has 64 divisors (see below), whose sum is σ = 142663680. Its totient is φ = 23740416.

The previous prime is 61361257. The next prime is 61361351. The reversal of 61361320 is 2316316.

It is a junction number, because it is equal to n+sod(n) for n = 61361291 and 61361300.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 238632 + ... + 238888.

It is an arithmetic number, because the mean of its divisors is an integer number (2229120).

Almost surely, 2^61361320 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 61361320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71331840).

61361320 is an abundant number, since it is smaller than the sum of its proper divisors (81302360).

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

61361320 is a wasteful number, since it uses less digits than its factorization.

61361320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442 (or 438 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 61361320 is about 7833.3466666553. The cubic root of 61361320 is about 394.4254210814.

Adding to 61361320 its reverse (2316316), we get a palindrome (63677636).

The spelling of 61361320 in words is "sixty-one million, three hundred sixty-one thousand, three hundred twenty".