61647766168 has 16 divisors (see below), whose sum is σ = 121673223000. Its totient is φ = 29201573376.

The previous prime is 61647766163. The next prime is 61647766217. The reversal of 61647766168 is 86166774616.

61647766168 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61647766163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202788553 + ... + 202788856.

Almost surely, 2^61647766168 is an apocalyptic number.

It is an amenable number.

61647766168 is a deficient number, since it is larger than the sum of its proper divisors (60025456832).

61647766168 is a wasteful number, since it uses less digits than its factorization.

61647766168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405577434 (or 405577430 counting only the distinct ones).

The product of its digits is 12192768, while the sum is 58.

The spelling of 61647766168 in words is "sixty-one billion, six hundred forty-seven million, seven hundred sixty-six thousand, one hundred sixty-eight".