671846995864 has 32 divisors (see below), whose sum is σ = 1375057166400. Its totient is φ = 305201737120.

The previous prime is 671846995861. The next prime is 671846995867. The reversal of 671846995864 is 468599648176.

It is an interprime number because it is at equal distance from previous prime (671846995861) and next prime (671846995867).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671846995861) 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, 2143234 + ... + 2436625.

It is an arithmetic number, because the mean of its divisors is an integer number (42970536450).

Almost surely, 2^671846995864 is an apocalyptic number.

It is an amenable number.

671846995864 is an abundant number, since it is smaller than the sum of its proper divisors (703210170536).

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

671846995864 is a wasteful number, since it uses less digits than its factorization.

671846995864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4581543 (or 4581539 counting only the distinct ones).

The product of its digits is 627056640, while the sum is 73.

The spelling of 671846995864 in words is "six hundred seventy-one billion, eight hundred forty-six million, nine hundred ninety-five thousand, eight hundred sixty-four".