671261838880 has 24 divisors (see below), whose sum is σ = 1585856094732. Its totient is φ = 268504735488.

The previous prime is 671261838859. The next prime is 671261838953. The reversal of 671261838880 is 88838162176.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 666907422736 + 4354416144 = 816644^2 + 65988^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2097693087 + ... + 2097693406.

Almost surely, 2^671261838880 is an apocalyptic number.

It is an amenable number.

671261838880 is an abundant number, since it is smaller than the sum of its proper divisors (914594255852).

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

671261838880 is a wasteful number, since it uses less digits than its factorization.

671261838880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4195386508 (or 4195386500 counting only the distinct ones).

The product of its (nonzero) digits is 6193152, while the sum is 58.

The spelling of 671261838880 in words is "six hundred seventy-one billion, two hundred sixty-one million, eight hundred thirty-eight thousand, eight hundred eighty".