61100560 has 20 divisors (see below), whose sum is σ = 142058988. Its totient is φ = 24440192.

The previous prime is 61100539. The next prime is 61100563. The reversal of 61100560 is 6500116.

It can be written as a sum of positive squares in 2 ways, for example, as 8856576 + 52243984 = 2976^2 + 7228^2 .

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

It is not an unprimeable number, because it can be changed into a prime (61100563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 381799 + ... + 381958.

Almost surely, 2^61100560 is an apocalyptic number.

It is an amenable number.

61100560 is an abundant number, since it is smaller than the sum of its proper divisors (80958428).

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

61100560 is a wasteful number, since it uses less digits than its factorization.

61100560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763770 (or 763764 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 61100560 is about 7816.6847192400. The cubic root of 61100560 is about 393.8659132996.

Adding to 61100560 its reverse (6500116), we get a palindrome (67600676).

It can be divided in two parts, 611005 and 60, that added together give a triangular number (611065 = T₁₁₀₅).

The spelling of 61100560 in words is "sixty-one million, one hundred thousand, five hundred sixty".