197198952535 has 16 divisors (see below), whose sum is σ = 254988246240. Its totient is φ = 145540114560.

The previous prime is 197198952529. The next prime is 197198952571. The reversal of 197198952535 is 535259891791.

It is a happy number.

It is not a de Polignac number, because 197198952535 - 2³ = 197198952527 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 758125 + ... + 984454.

It is an arithmetic number, because the mean of its divisors is an integer number (15936765390).

Almost surely, 2^197198952535 is an apocalyptic number.

197198952535 is a deficient number, since it is larger than the sum of its proper divisors (57789293705).

197198952535 is a wasteful number, since it uses less digits than its factorization.

197198952535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1744338.

The product of its digits is 30618000, while the sum is 64.

The spelling of 197198952535 in words is "one hundred ninety-seven billion, one hundred ninety-eight million, nine hundred fifty-two thousand, five hundred thirty-five".