1898216625321 has 12 divisors (see below), whose sum is σ = 2772675970740. Its totient is φ = 1251258898560.

The previous prime is 1898216625307. The next prime is 1898216625337. The reversal of 1898216625321 is 1235266128981.

1898216625321 is a `hidden beast` number, since 1 + 8 + 9 + 8 + 2 + 1 + 6 + 625 + 3 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 745951779225 + 1152264846096 = 863685^2 + 1073436^2 .

It is not a de Polignac number, because 1898216625321 - 2²³ = 1898208236713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1898216623321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1184903460 + ... + 1184905061.

It is an arithmetic number, because the mean of its divisors is an integer number (231056330895).

Almost surely, 2^{1898216625321} is an apocalyptic number.

It is an amenable number.

1898216625321 is a deficient number, since it is larger than the sum of its proper divisors (874459345419).

1898216625321 is a wasteful number, since it uses less digits than its factorization.

1898216625321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2369808616 (or 2369808613 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 54.

The spelling of 1898216625321 in words is "one trillion, eight hundred ninety-eight billion, two hundred sixteen million, six hundred twenty-five thousand, three hundred twenty-one".