197375877626449 has 2 divisors, whose sum is σ = 197375877626450. Its totient is φ = 197375877626448.

The previous prime is 197375877626399. The next prime is 197375877626503. The reversal of 197375877626449 is 944626778573791.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129075570266449 + 68300307360000 = 11361143^2 + 8264400^2 .

It is a cyclic number.

It is not a de Polignac number, because 197375877626449 - 2⁷ = 197375877626321 is a prime.

It is not a weakly prime, because it can be changed into another prime (197375877626749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98687938813224 + 98687938813225.

It is an arithmetic number, because the mean of its divisors is an integer number (98687938813225).

Almost surely, 2^{197375877626449} is an apocalyptic number.

It is an amenable number.

197375877626449 is a deficient number, since it is larger than the sum of its proper divisors (1).

197375877626449 is an equidigital number, since it uses as much as digits as its factorization.

197375877626449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26885053440, while the sum is 85.

The spelling of 197375877626449 in words is "one hundred ninety-seven trillion, three hundred seventy-five billion, eight hundred seventy-seven million, six hundred twenty-six thousand, four hundred forty-nine".