861803975377 has 8 divisors (see below), whose sum is σ = 863761000320. Its totient is φ = 859847363760.

The previous prime is 861803975371. The next prime is 861803975387. The reversal of 861803975377 is 773579308168.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-861803975377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (861803975371) 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, 4282074 + ... + 4478812.

It is an arithmetic number, because the mean of its divisors is an integer number (107970125040).

Almost surely, 2^861803975377 is an apocalyptic number.

It is an amenable number.

861803975377 is a deficient number, since it is larger than the sum of its proper divisors (1957024943).

861803975377 is a wasteful number, since it uses less digits than its factorization.

861803975377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206663.

The product of its (nonzero) digits is 53343360, while the sum is 64.

The spelling of 861803975377 in words is "eight hundred sixty-one billion, eight hundred three million, nine hundred seventy-five thousand, three hundred seventy-seven".