137866569217 has 8 divisors (see below), whose sum is σ = 148500608256. Its totient is φ = 127236661392.

The previous prime is 137866569143. The next prime is 137866569233. The reversal of 137866569217 is 712965668731.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 137866569217 - 2¹⁹ = 137866044929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (137866569257) 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, 963313 + ... + 1097134.

It is an arithmetic number, because the mean of its divisors is an integer number (18562576032).

Almost surely, 2^137866569217 is an apocalyptic number.

It is an amenable number.

137866569217 is a deficient number, since it is larger than the sum of its proper divisors (10634039039).

137866569217 is a wasteful number, since it uses less digits than its factorization.

137866569217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2065607.

The product of its digits is 22861440, while the sum is 61.

The spelling of 137866569217 in words is "one hundred thirty-seven billion, eight hundred sixty-six million, five hundred sixty-nine thousand, two hundred seventeen".