671928129120 has 96 divisors (see below), whose sum is σ = 2127655434240. Its totient is φ = 178242690560.

The previous prime is 671928129101. The next prime is 671928129167. The reversal of 671928129120 is 21921829176.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 671928129120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3572850 + ... + 3756209.

It is an arithmetic number, because the mean of its divisors is an integer number (22163077440).

Almost surely, 2^671928129120 is an apocalyptic number.

671928129120 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

671928129120 is an abundant number, since it is smaller than the sum of its proper divisors (1455727305120).

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

671928129120 is a wasteful number, since it uses less digits than its factorization.

671928129120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7329268 (or 7329260 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 48.

The spelling of 671928129120 in words is "six hundred seventy-one billion, nine hundred twenty-eight million, one hundred twenty-nine thousand, one hundred twenty".