1672721875 has 24 divisors (see below), whose sum is σ = 2280885264. Its totient is φ = 1216500000.

The previous prime is 1672721861. The next prime is 1672721891. The reversal of 1672721875 is 5781272761.

It is a de Polignac number, because none of the positive numbers 2^k-1672721875 is a prime.

It is a super-2 number, since 2×1672721875² = 5595996942207031250, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10045 + ... + 58705.

It is an arithmetic number, because the mean of its divisors is an integer number (95036886).

Almost surely, 2^1672721875 is an apocalyptic number.

1672721875 is a deficient number, since it is larger than the sum of its proper divisors (608163389).

1672721875 is an frugal number, since it uses more digits than its factorization.

1672721875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48697 (or 48677 counting only the distinct ones).

The product of its digits is 329280, while the sum is 46.

The square root of 1672721875 is about 40898.9226630727. The cubic root of 1672721875 is about 1187.0652147906.

The spelling of 1672721875 in words is "one billion, six hundred seventy-two million, seven hundred twenty-one thousand, eight hundred seventy-five".