861671848719 has 8 divisors (see below), whose sum is σ = 1253340870912. Its totient is φ = 522225362840.

The previous prime is 861671848703. The next prime is 861671848801. The reversal of 861671848719 is 917848176168.

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

It is a cyclic number.

It is not a de Polignac number, because 861671848719 - 2⁴ = 861671848703 is a prime.

It is a super-2 number, since 2×861671848719² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 861671848719.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861671848519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13055634039 + ... + 13055634104.

It is an arithmetic number, because the mean of its divisors is an integer number (156667608864).

Almost surely, 2^861671848719 is an apocalyptic number.

861671848719 is a deficient number, since it is larger than the sum of its proper divisors (391669022193).

861671848719 is a wasteful number, since it uses less digits than its factorization.

861671848719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26111268157.

The product of its digits is 32514048, while the sum is 66.

The spelling of 861671848719 in words is "eight hundred sixty-one billion, six hundred seventy-one million, eight hundred forty-eight thousand, seven hundred nineteen".