671000340040 has 64 divisors (see below), whose sum is σ = 1583206009200. Its totient is φ = 255594995712.

The previous prime is 671000339987. The next prime is 671000340041. The reversal of 671000340040 is 40043000176.

It can be written as a sum of positive squares in 8 ways, for example, as 264004826596 + 406995513444 = 513814^2 + 637962^2 .

It is a junction number, because it is equal to n+sod(n) for n = 671000339987 and 671000340014.

It is not an unprimeable number, because it can be changed into a prime (671000340041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3877297 + ... + 4046656.

Almost surely, 2^671000340040 is an apocalyptic number.

It is an amenable number.

671000340040 is an abundant number, since it is smaller than the sum of its proper divisors (912205669160).

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

671000340040 is a wasteful number, since it uses less digits than its factorization.

671000340040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7924066 (or 7924062 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 25.

The spelling of 671000340040 in words is "six hundred seventy-one billion, three hundred forty thousand, forty".