671700373840 has 60 divisors (see below), whose sum is σ = 1632555798804. Its totient is φ = 256998387712.

The previous prime is 671700373763. The next prime is 671700373847. The reversal of 671700373840 is 48373007176.

It can be written as a sum of positive squares in 2 ways, for example, as 226934093376 + 444766280464 = 476376^2 + 666908^2 .

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671700373847) 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 11 ways as a sum of consecutive naturals, for example, 7893649 + ... + 7978288.

Almost surely, 2^671700373840 is an apocalyptic number.

It is an amenable number.

671700373840 is an abundant number, since it is smaller than the sum of its proper divisors (960855424964).

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

671700373840 is a wasteful number, since it uses less digits than its factorization.

671700373840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15871996 (or 15871967 counting only the distinct ones).

The product of its (nonzero) digits is 592704, while the sum is 46.

The spelling of 671700373840 in words is "six hundred seventy-one billion, seven hundred million, three hundred seventy-three thousand, eight hundred forty".