671325653680 has 80 divisors (see below), whose sum is σ = 1702851573024. Its totient is φ = 244100413440.

The previous prime is 671325653633. The next prime is 671325653681. The reversal of 671325653680 is 86356523176.

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

It is not an unprimeable number, because it can be changed into a prime (671325653681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20027014 + ... + 20060506.

Almost surely, 2^671325653680 is an apocalyptic number.

It is an amenable number.

671325653680 is an abundant number, since it is smaller than the sum of its proper divisors (1031525919344).

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

671325653680 is a wasteful number, since it uses less digits than its factorization.

671325653680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56294 (or 56288 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 52.

The spelling of 671325653680 in words is "six hundred seventy-one billion, three hundred twenty-five million, six hundred fifty-three thousand, six hundred eighty".