671157484240 has 80 divisors (see below), whose sum is σ = 1576468528128. Its totient is φ = 265708505088.

The previous prime is 671157484213. The next prime is 671157484253. The reversal of 671157484240 is 42484751176.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-3 number, since 3×671157484240³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 15411777 + ... + 15455263.

Almost surely, 2^671157484240 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 671157484240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (788234264064).

671157484240 is an abundant number, since it is smaller than the sum of its proper divisors (905311043888).

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

671157484240 is a wasteful number, since it uses less digits than its factorization.

671157484240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45476 (or 45470 counting only the distinct ones).

The product of its (nonzero) digits is 1505280, while the sum is 49.

The spelling of 671157484240 in words is "six hundred seventy-one billion, one hundred fifty-seven million, four hundred eighty-four thousand, two hundred forty".