38891664040289 has 4 divisors (see below), whose sum is σ = 40938593726640. Its totient is φ = 36844734353940.

The previous prime is 38891664040259. The next prime is 38891664040301. The reversal of 38891664040289 is 98204046619883.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38891664040289 is a prime.

It is a super-3 number, since 3×38891664040289³ (a number of 42 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38891664040259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1023464843147 + ... + 1023464843184.

It is an arithmetic number, because the mean of its divisors is an integer number (10234648431660).

Almost surely, 2^{38891664040289} is an apocalyptic number.

It is an amenable number.

38891664040289 is a deficient number, since it is larger than the sum of its proper divisors (2046929686351).

38891664040289 is a wasteful number, since it uses less digits than its factorization.

38891664040289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2046929686350.

The product of its (nonzero) digits is 143327232, while the sum is 68.

The spelling of 38891664040289 in words is "thirty-eight trillion, eight hundred ninety-one billion, six hundred sixty-four million, forty thousand, two hundred eighty-nine".