61704031668 has 24 divisors (see below), whose sum is σ = 145798558080. Its totient is φ = 20307655680.

The previous prime is 61704031663. The next prime is 61704031679. The reversal of 61704031668 is 86613040716.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61704031663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32543373 + ... + 32545268.

It is an arithmetic number, because the mean of its divisors is an integer number (6074939920).

Almost surely, 2^61704031668 is an apocalyptic number.

It is an amenable number.

61704031668 is an abundant number, since it is smaller than the sum of its proper divisors (84094526412).

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

61704031668 is a wasteful number, since it uses less digits than its factorization.

61704031668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65088727 (or 65088725 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The spelling of 61704031668 in words is "sixty-one billion, seven hundred four million, thirty-one thousand, six hundred sixty-eight".