861693340208 has 40 divisors (see below), whose sum is σ = 1684406857728. Its totient is φ = 427024729152.

The previous prime is 861693340201. The next prime is 861693340229. The reversal of 861693340208 is 802043396168.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (861693340201) 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 7 ways as a sum of consecutive naturals, for example, 277985 + ... + 1341887.

Almost surely, 2^861693340208 is an apocalyptic number.

It is an amenable number.

861693340208 is a deficient number, since it is larger than the sum of its proper divisors (822713517520).

861693340208 is a wasteful number, since it uses less digits than its factorization.

861693340208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1064361 (or 1064355 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 50.

The spelling of 861693340208 in words is "eight hundred sixty-one billion, six hundred ninety-three million, three hundred forty thousand, two hundred eight".