38890989508985 has 16 divisors (see below), whose sum is σ = 47309159819664. Its totient is φ = 30686155379712.

The previous prime is 38890989508967. The next prime is 38890989508999. The reversal of 38890989508985 is 58980598909883.

It can be written as a sum of positive squares in 8 ways, for example, as 5227135681849 + 33663853827136 = 2286293^2 + 5802056^2 .

It is a cyclic number.

It is not a de Polignac number, because 38890989508985 - 2³⁸ = 38616111602041 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 38890989508985.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26459789 + ... + 27890901.

It is an arithmetic number, because the mean of its divisors is an integer number (2956822488729).

Almost surely, 2^{38890989508985} is an apocalyptic number.

It is an amenable number.

38890989508985 is a deficient number, since it is larger than the sum of its proper divisors (8418170310679).

38890989508985 is a wasteful number, since it uses less digits than its factorization.

38890989508985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1505644.

The product of its (nonzero) digits is 16124313600, while the sum is 89.

The spelling of 38890989508985 in words is "thirty-eight trillion, eight hundred ninety billion, nine hundred eighty-nine million, five hundred eight thousand, nine hundred eighty-five".