197923449844 has 18 divisors (see below), whose sum is σ = 365555294034. Its totient is φ = 93753212400.

The previous prime is 197923449827. The next prime is 197923449851. The reversal of 197923449844 is 448944329791.

It can be written as a sum of positive squares in only one way, i.e., 187629318244 + 10294131600 = 433162^2 + 101460^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 68531607 + ... + 68534494.

Almost surely, 2^197923449844 is an apocalyptic number.

It is an amenable number.

197923449844 is a deficient number, since it is larger than the sum of its proper divisors (167631844190).

197923449844 is a wasteful number, since it uses less digits than its factorization.

197923449844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137066143 (or 137066122 counting only the distinct ones).

The product of its digits is 62705664, while the sum is 64.

The spelling of 197923449844 in words is "one hundred ninety-seven billion, nine hundred twenty-three million, four hundred forty-nine thousand, eight hundred forty-four".