1885983102721 has 9 divisors (see below), whose sum is σ = 2003473979011. Its totient is φ = 1775020947232.

The previous prime is 1885983102713. The next prime is 1885983102739. The reversal of 1885983102721 is 1272013895881.

It is a happy number.

The square root of 1885983102721 is 1373311.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1468325945025 + 417657157696 = 1211745^2 + 646264^2 .

It is not a de Polignac number, because 1885983102721 - 2³ = 1885983102713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1885983102701) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 23305896 + ... + 23386678.

Almost surely, 2^{1885983102721} is an apocalyptic number.

1885983102721 is the 1373311-st square number.

1885983102721 is the 686656-th centered octagonal number.

It is an amenable number.

1885983102721 is a deficient number, since it is larger than the sum of its proper divisors (117490876290).

1885983102721 is an frugal number, since it uses more digits than its factorization.

1885983102721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161600 (or 80800 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 55.

The spelling of 1885983102721 in words is "one trillion, eight hundred eighty-five billion, nine hundred eighty-three million, one hundred two thousand, seven hundred twenty-one".