197279634262128 has 40 divisors (see below), whose sum is σ = 555969878376576. Its totient is φ = 59781707352000.

The previous prime is 197279634262121. The next prime is 197279634262181. The reversal of 197279634262128 is 821262436972791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197279634262121) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 186817834948 + ... + 186817836003.

Almost surely, 2^{197279634262128} is an apocalyptic number.

It is an amenable number.

197279634262128 is an abundant number, since it is smaller than the sum of its proper divisors (358690244114448).

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

197279634262128 is a wasteful number, since it uses less digits than its factorization.

197279634262128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373635670973 (or 373635670967 counting only the distinct ones).

The product of its digits is 219469824, while the sum is 69.

The spelling of 197279634262128 in words is "one hundred ninety-seven trillion, two hundred seventy-nine billion, six hundred thirty-four million, two hundred sixty-two thousand, one hundred twenty-eight".