61307688556 has 12 divisors (see below), whose sum is σ = 107756965120. Its totient is φ = 30519984240.

The previous prime is 61307688551. The next prime is 61307688581. The reversal of 61307688556 is 65588670316.

It is a junction number, because it is equal to n+sod(n) for n = 61307688497 and 61307688506.

It is not an unprimeable number, because it can be changed into a prime (61307688551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33463980 + ... + 33465811.

Almost surely, 2^61307688556 is an apocalyptic number.

It is an amenable number.

61307688556 is a deficient number, since it is larger than the sum of its proper divisors (46449276564).

61307688556 is a wasteful number, since it uses less digits than its factorization.

61307688556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66930024 (or 66930022 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 55.

The spelling of 61307688556 in words is "sixty-one billion, three hundred seven million, six hundred eighty-eight thousand, five hundred fifty-six".