671021035872 has 48 divisors (see below), whose sum is σ = 1921560242112. Its totient is φ = 203339707520.

The previous prime is 671021035871. The next prime is 671021035873. The reversal of 671021035872 is 278530120176.

671021035872 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (671021035871) and next prime (671021035873).

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671021035871) 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, 317717238 + ... + 317719349.

It is an arithmetic number, because the mean of its divisors is an integer number (40032505044).

Almost surely, 2^671021035872 is an apocalyptic number.

It is an amenable number.

671021035872 is an abundant number, since it is smaller than the sum of its proper divisors (1250539206240).

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

671021035872 is a wasteful number, since it uses less digits than its factorization.

671021035872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635436611 (or 635436603 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 42.

The spelling of 671021035872 in words is "six hundred seventy-one billion, twenty-one million, thirty-five thousand, eight hundred seventy-two".