1671956800728 has 64 divisors (see below), whose sum is σ = 4277345318400. Its totient is φ = 544326652800.

The previous prime is 1671956800721. The next prime is 1671956800747. The reversal of 1671956800728 is 8270086591761.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1671956800721) 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, 23730753 + ... + 23801103.

It is an arithmetic number, because the mean of its divisors is an integer number (66833520600).

Almost surely, 2^{1671956800728} is an apocalyptic number.

It is an amenable number.

1671956800728 is an abundant number, since it is smaller than the sum of its proper divisors (2605388517672).

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

1671956800728 is a wasteful number, since it uses less digits than its factorization.

1671956800728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93432 (or 93428 counting only the distinct ones).

The product of its (nonzero) digits is 10160640, while the sum is 60.

The spelling of 1671956800728 in words is "one trillion, six hundred seventy-one billion, nine hundred fifty-six million, eight hundred thousand, seven hundred twenty-eight".