19695741122649 has 32 divisors (see below), whose sum is σ = 26673952739200. Its totient is φ = 12924752739840.

The previous prime is 19695741122647. The next prime is 19695741122653. The reversal of 19695741122649 is 94622114759691.

It is not a de Polignac number, because 19695741122649 - 2¹ = 19695741122647 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19695741122649.

It is not an unprimeable number, because it can be changed into a prime (19695741122647) 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 31 ways as a sum of consecutive naturals, for example, 270290382 + ... + 270363240.

It is an arithmetic number, because the mean of its divisors is an integer number (833561023100).

Almost surely, 2^{19695741122649} is an apocalyptic number.

It is an amenable number.

19695741122649 is a deficient number, since it is larger than the sum of its proper divisors (6978211616551).

19695741122649 is a wasteful number, since it uses less digits than its factorization.

19695741122649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75385.

The product of its digits is 58786560, while the sum is 66.

The spelling of 19695741122649 in words is "nineteen trillion, six hundred ninety-five billion, seven hundred forty-one million, one hundred twenty-two thousand, six hundred forty-nine".