195421067657 has 16 divisors (see below), whose sum is σ = 218009076480. Its totient is φ = 174220856832.

The previous prime is 195421067537. The next prime is 195421067683. The reversal of 195421067657 is 756760124591.

It is not a de Polignac number, because 195421067657 - 2¹⁶ = 195421002121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 195421067599 and 195421067608.

It is not an unprimeable number, because it can be changed into a prime (195421060657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2385932 + ... + 2466477.

It is an arithmetic number, because the mean of its divisors is an integer number (13625567280).

Almost surely, 2^195421067657 is an apocalyptic number.

195421067657 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

195421067657 is a deficient number, since it is larger than the sum of its proper divisors (22588008823).

195421067657 is a wasteful number, since it uses less digits than its factorization.

195421067657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4852552.

The product of its (nonzero) digits is 3175200, while the sum is 53.

The spelling of 195421067657 in words is "one hundred ninety-five billion, four hundred twenty-one million, sixty-seven thousand, six hundred fifty-seven".