197961960377 has 8 divisors (see below), whose sum is σ = 202808676840. Its totient is φ = 193116119040.

The previous prime is 197961960347. The next prime is 197961960401. The reversal of 197961960377 is 773069169791.

It can be written as a sum of positive squares in 4 ways, for example, as 26914371136 + 171047589241 = 164056^2 + 413579^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 197961960377 - 2⁸ = 197961960121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197961960347) 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, 251393 + ... + 677585.

It is an arithmetic number, because the mean of its divisors is an integer number (25351084605).

Almost surely, 2^197961960377 is an apocalyptic number.

It is an amenable number.

197961960377 is a deficient number, since it is larger than the sum of its proper divisors (4846716463).

197961960377 is a wasteful number, since it uses less digits than its factorization.

197961960377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437563.

The product of its (nonzero) digits is 27005076, while the sum is 65.

The spelling of 197961960377 in words is "one hundred ninety-seven billion, nine hundred sixty-one million, nine hundred sixty thousand, three hundred seventy-seven".