61655165986 has 32 divisors (see below), whose sum is σ = 96474896640. Its totient is φ = 29533680000.

The previous prime is 61655165963. The next prime is 61655165987. The reversal of 61655165986 is 68956155616.

It is a super-2 number, since 2×61655165986² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61655165986.

It is not an unprimeable number, because it can be changed into a prime (61655165987) 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 15 ways as a sum of consecutive naturals, for example, 685111 + ... + 769861.

It is an arithmetic number, because the mean of its divisors is an integer number (3014840520).

Almost surely, 2^61655165986 is an apocalyptic number.

61655165986 is a deficient number, since it is larger than the sum of its proper divisors (34819730654).

61655165986 is a wasteful number, since it uses less digits than its factorization.

61655165986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84970.

The product of its digits is 11664000, while the sum is 58.

The spelling of 61655165986 in words is "sixty-one billion, six hundred fifty-five million, one hundred sixty-five thousand, nine hundred eighty-six".