1672803661320 has 256 divisors, whose sum is σ = 6084087552000. Its totient is φ = 405450489600.

The previous prime is 1672803661313. The next prime is 1672803661339. The reversal of 1672803661320 is 231663082761.

1672803661320 is a `hidden beast` number, since 1 + 6 + 7 + 2 + 8 + 0 + 3 + 6 + 613 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 84088575 + ... + 84108465.

It is an arithmetic number, because the mean of its divisors is an integer number (23765967000).

Almost surely, 2^{1672803661320} is an apocalyptic number.

1672803661320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1672803661320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3042043776000).

1672803661320 is an abundant number, since it is smaller than the sum of its proper divisors (4411283890680).

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

1672803661320 is a wasteful number, since it uses less digits than its factorization.

1672803661320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27001 (or 26991 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The spelling of 1672803661320 in words is "one trillion, six hundred seventy-two billion, eight hundred three million, six hundred sixty-one thousand, three hundred twenty".