671303026240 has 448 divisors, whose sum is σ = 2052718272000. Its totient is φ = 207277056000.

The previous prime is 671303026213. The next prime is 671303026249. The reversal of 671303026240 is 42620303176.

It is a tau number, because it is divible by the number of its divisors (448).

It is a junction number, because it is equal to n+sod(n) for n = 671303026196 and 671303026205.

It is not an unprimeable number, because it can be changed into a prime (671303026249) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 131599690 + ... + 131604790.

Almost surely, 2^671303026240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 671303026240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1026359136000).

671303026240 is an abundant number, since it is smaller than the sum of its proper divisors (1381415245760).

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

671303026240 is a wasteful number, since it uses less digits than its factorization.

671303026240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5259 (or 5235 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 34.

The spelling of 671303026240 in words is "six hundred seventy-one billion, three hundred three million, twenty-six thousand, two hundred forty".