19105725641444 has 12 divisors (see below), whose sum is σ = 36006944478204. Its totient is φ = 8818027219104.

The previous prime is 19105725641393. The next prime is 19105725641461. The reversal of 19105725641444 is 44414652750191.

It can be written as a sum of positive squares in 2 ways, for example, as 3256472884900 + 15849252756544 = 1804570^2 + 3981112^2 .

It is a super-2 number, since 2×19105725641444² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 183708900347 + ... + 183708900450.

It is an arithmetic number, because the mean of its divisors is an integer number (3000578706517).

Almost surely, 2^{19105725641444} is an apocalyptic number.

It is an amenable number.

19105725641444 is a deficient number, since it is larger than the sum of its proper divisors (16901218836760).

19105725641444 is a wasteful number, since it uses less digits than its factorization.

19105725641444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367417800814 (or 367417800812 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 53.

The spelling of 19105725641444 in words is "nineteen trillion, one hundred five billion, seven hundred twenty-five million, six hundred forty-one thousand, four hundred forty-four".