671172011328 has 224 divisors, whose sum is σ = 2187169632256. Its totient is φ = 176886208512.

The previous prime is 671172011297. The next prime is 671172011347. The reversal of 671172011328 is 823110271176.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (224).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25898025 + ... + 25923927.

It is an arithmetic number, because the mean of its divisors is an integer number (9764150144).

Almost surely, 2^671172011328 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 671172011328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1093584816128).

671172011328 is an abundant number, since it is smaller than the sum of its proper divisors (1515997620928).

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

671172011328 is a wasteful number, since it uses less digits than its factorization.

671172011328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27421 (or 27411 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 39.

The spelling of 671172011328 in words is "six hundred seventy-one billion, one hundred seventy-two million, eleven thousand, three hundred twenty-eight".