19538069661087 has 8 divisors (see below), whose sum is σ = 26133988813104. Its totient is φ = 12983765141568.

The previous prime is 19538069661083. The next prime is 19538069661151. The reversal of 19538069661087 is 78016696083591.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 19538069661087 - 2² = 19538069661083 is a prime.

It is a super-3 number, since 3×19538069661087³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19538069661083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10403657028 + ... + 10403658905.

It is an arithmetic number, because the mean of its divisors is an integer number (3266748601638).

Almost surely, 2^{19538069661087} is an apocalyptic number.

19538069661087 is a deficient number, since it is larger than the sum of its proper divisors (6595919152017).

19538069661087 is a wasteful number, since it uses less digits than its factorization.

19538069661087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20807316249.

The product of its (nonzero) digits is 117573120, while the sum is 69.

The spelling of 19538069661087 in words is "nineteen trillion, five hundred thirty-eight billion, sixty-nine million, six hundred sixty-one thousand, eighty-seven".