671397164928 has 384 divisors, whose sum is σ = 2345675754240. Its totient is φ = 187146547200.

The previous prime is 671397164923. The next prime is 671397164939. The reversal of 671397164928 is 829461793176.

671397164928 is a `hidden beast` number, since 6 + 7 + 139 + 7 + 1 + 6 + 492 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671397164923) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8889243 + ... + 8964453.

It is an arithmetic number, because the mean of its divisors is an integer number (6108530610).

Almost surely, 2^671397164928 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 671397164928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1172837877120).

671397164928 is an abundant number, since it is smaller than the sum of its proper divisors (1674278589312).

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

671397164928 is an equidigital number, since it uses as much as digits as its factorization.

671397164928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75288 (or 75264 counting only the distinct ones).

The product of its digits is 27433728, while the sum is 63.

The spelling of 671397164928 in words is "six hundred seventy-one billion, three hundred ninety-seven million, one hundred sixty-four thousand, nine hundred twenty-eight".