61005556060 has 36 divisors (see below), whose sum is σ = 135209283048. Its totient is φ = 23117892192.

The previous prime is 61005556039. The next prime is 61005556067. The reversal of 61005556060 is 6065550016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61005556067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4217542 + ... + 4231981.

It is an arithmetic number, because the mean of its divisors is an integer number (3755813418).

Almost surely, 2^61005556060 is an apocalyptic number.

It is an amenable number.

61005556060 is an abundant number, since it is smaller than the sum of its proper divisors (74203726988).

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

61005556060 is a wasteful number, since it uses less digits than its factorization.

61005556060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8449570 (or 8449549 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 34.

The spelling of 61005556060 in words is "sixty-one billion, five million, five hundred fifty-six thousand, sixty".