19795561593438 has 16 divisors (see below), whose sum is σ = 41920012786320. Its totient is φ = 6210372264576.

The previous prime is 19795561593433. The next prime is 19795561593439. The reversal of 19795561593438 is 83439516559791.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 19795561593438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19795561593433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97037066533 + ... + 97037066736.

It is an arithmetic number, because the mean of its divisors is an integer number (2620000799145).

Almost surely, 2^{19795561593438} is an apocalyptic number.

19795561593438 is an abundant number, since it is smaller than the sum of its proper divisors (22124451192882).

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

19795561593438 is a wasteful number, since it uses less digits than its factorization.

19795561593438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194074133291.

The product of its digits is 1102248000, while the sum is 75.

The spelling of 19795561593438 in words is "nineteen trillion, seven hundred ninety-five billion, five hundred sixty-one million, five hundred ninety-three thousand, four hundred thirty-eight".