197995804544 has 64 divisors (see below), whose sum is σ = 432049172400. Its totient is φ = 89961553920.

The previous prime is 197995804511. The next prime is 197995804619. The reversal of 197995804544 is 445408599791.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1505702 + ... + 1631909.

Almost surely, 2^197995804544 is an apocalyptic number.

It is an amenable number.

197995804544 is an abundant number, since it is smaller than the sum of its proper divisors (234053367856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

197995804544 is a wasteful number, since it uses less digits than its factorization.

197995804544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3137671 (or 3137659 counting only the distinct ones).

The product of its (nonzero) digits is 65318400, while the sum is 65.

The spelling of 197995804544 in words is "one hundred ninety-seven billion, nine hundred ninety-five million, eight hundred four thousand, five hundred forty-four".