61556060 has 12 divisors (see below), whose sum is σ = 129267768. Its totient is φ = 24622416.

The previous prime is 61556059. The next prime is 61556071. The reversal of 61556060 is 6065516.

It is a congruent number.

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, 1538882 + ... + 1538921.

It is an arithmetic number, because the mean of its divisors is an integer number (10772314).

Almost surely, 2^61556060 is an apocalyptic number.

It is an amenable number.

61556060 is an abundant number, since it is smaller than the sum of its proper divisors (67711708).

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

61556060 is a wasteful number, since it uses less digits than its factorization.

61556060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3077812 (or 3077810 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 61556060 is about 7845.7670115802. The cubic root of 61556060 is about 394.8422379119.

The spelling of 61556060 in words is "sixty-one million, five hundred fifty-six thousand, sixty".