19690771320144 has 100 divisors (see below), whose sum is σ = 57305671963540. Its totient is φ = 6527327431680.

The previous prime is 19690771320133. The next prime is 19690771320193. The reversal of 19690771320144 is 44102317709691.

19690771320144 is a `hidden beast` number, since 1 + 96 + 90 + 7 + 7 + 1 + 320 + 144 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1199051280144 + 18491720040000 = 1095012^2 + 4300200^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 41736409 + ... + 42205560.

Almost surely, 2^{19690771320144} is an apocalyptic number.

It is an amenable number.

19690771320144 is an abundant number, since it is smaller than the sum of its proper divisors (37614900643396).

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

19690771320144 is a wasteful number, since it uses less digits than its factorization.

19690771320144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83942170 (or 83942155 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 54.

The spelling of 19690771320144 in words is "nineteen trillion, six hundred ninety billion, seven hundred seventy-one million, three hundred twenty thousand, one hundred forty-four".