198476487049 has 3 divisors (see below), whose sum is σ = 198476932557. Its totient is φ = 198476041542.

The previous prime is 198476486987. The next prime is 198476487071. The reversal of 198476487049 is 940784674891.

The square root of 198476487049 is 445507.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a de Polignac number, because none of the positive numbers 2^k-198476487049 is a prime.

It is a super-2 number, since 2×198476487049² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198476407049) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 222754 + ... + 668260.

It is an arithmetic number, because the mean of its divisors is an integer number (66158977519).

Almost surely, 2^198476487049 is an apocalyptic number.

198476487049 is the 445507-th square number.

198476487049 is the 222754-th centered octagonal number.

It is an amenable number.

198476487049 is a deficient number, since it is larger than the sum of its proper divisors (445508).

198476487049 is an frugal number, since it uses more digits than its factorization.

198476487049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 891014 (or 445507 counting only the distinct ones).

The product of its (nonzero) digits is 97542144, while the sum is 67.

The spelling of 198476487049 in words is "one hundred ninety-eight billion, four hundred seventy-six million, four hundred eighty-seven thousand, forty-nine".