198025453693 has 16 divisors (see below), whose sum is σ = 206789465520. Its totient is φ = 189443404800.

The previous prime is 198025453673. The next prime is 198025453699. The reversal of 198025453693 is 396354520891.

It can be written as a sum of positive squares in 8 ways, for example, as 16411403449 + 181614050244 = 128107^2 + 426162^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198025453693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198025453699) 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, 6550533 + ... + 6580693.

It is an arithmetic number, because the mean of its divisors is an integer number (12924341595).

Almost surely, 2^198025453693 is an apocalyptic number.

It is an amenable number.

198025453693 is a deficient number, since it is larger than the sum of its proper divisors (8764011827).

198025453693 is a wasteful number, since it uses less digits than its factorization.

198025453693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33168.

The product of its (nonzero) digits is 6998400, while the sum is 55.

The spelling of 198025453693 in words is "one hundred ninety-eight billion, twenty-five million, four hundred fifty-three thousand, six hundred ninety-three".