61535560 has 16 divisors (see below), whose sum is σ = 138455100. Its totient is φ = 24614208.

The previous prime is 61535531. The next prime is 61535609. The reversal of 61535560 is 6553516.

It can be written as a sum of positive squares in 2 ways, for example, as 56580484 + 4955076 = 7522^2 + 2226^2 .

It is a super-3 number, since 3×61535560³ (a number of 24 digits) contains 333 as substring.

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, 769155 + ... + 769234.

Almost surely, 2^61535560 is an apocalyptic number.

It is an amenable number.

61535560 is an abundant number, since it is smaller than the sum of its proper divisors (76919540).

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

61535560 is a wasteful number, since it uses less digits than its factorization.

61535560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1538400 (or 1538396 counting only the distinct ones).

The product of its (nonzero) digits is 13500, while the sum is 31.

The square root of 61535560 is about 7844.4604658319. The cubic root of 61535560 is about 394.7984016398.

The spelling of 61535560 in words is "sixty-one million, five hundred thirty-five thousand, five hundred sixty".