61686845689194 has 24 divisors (see below), whose sum is σ = 145805271629472. Its totient is φ = 18692983542120.

The previous prime is 61686845689151. The next prime is 61686845689213. The reversal of 61686845689194 is 49198654868616.

61686845689194 is a `hidden beast` number, since 6 + 1 + 6 + 86 + 8 + 456 + 89 + 1 + 9 + 4 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 155774862654 + ... + 155774863049.

It is an arithmetic number, because the mean of its divisors is an integer number (6075219651228).

Almost surely, 2^{61686845689194} is an apocalyptic number.

61686845689194 is an abundant number, since it is smaller than the sum of its proper divisors (84118425940278).

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

61686845689194 is a wasteful number, since it uses less digits than its factorization.

61686845689194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311549725722 (or 311549725719 counting only the distinct ones).

The product of its digits is 4299816960, while the sum is 81.

The spelling of 61686845689194 in words is "sixty-one trillion, six hundred eighty-six billion, eight hundred forty-five million, six hundred eighty-nine thousand, one hundred ninety-four".