61116560 has 20 divisors (see below), whose sum is σ = 142096188. Its totient is φ = 24446592.

The previous prime is 61116557. The next prime is 61116607. The reversal of 61116560 is 6561116.

It can be written as a sum of positive squares in 2 ways, for example, as 48385936 + 12730624 = 6956^2 + 3568^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 381899 + ... + 382058.

Almost surely, 2^61116560 is an apocalyptic number.

It is an amenable number.

61116560 is an abundant number, since it is smaller than the sum of its proper divisors (80979628).

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

61116560 is a wasteful number, since it uses less digits than its factorization.

61116560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763970 (or 763964 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 61116560 is about 7817.7081040417. The cubic root of 61116560 is about 393.9002899874.

Adding to 61116560 its reverse (6561116), we get a palindrome (67677676).

It can be divided in two parts, 611 and 16560, that added together give a palindrome (17171).

The spelling of 61116560 in words is "sixty-one million, one hundred sixteen thousand, five hundred sixty".