38108689645 has 32 divisors (see below), whose sum is σ = 50879011680. Its totient is φ = 27380920320.

The previous prime is 38108689643. The next prime is 38108689649. The reversal of 38108689645 is 54698680183.

It can be written as a sum of positive squares in 16 ways, for example, as 37728400644 + 380289001 = 194238^2 + 19501^2 .

It is not a de Polignac number, because 38108689645 - 2¹ = 38108689643 is a prime.

It is a super-3 number, since 3×38108689645³ (a number of 33 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 38108689645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38108689643) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 359565 + ... + 453325.

It is an arithmetic number, because the mean of its divisors is an integer number (1589969115).

Almost surely, 2^38108689645 is an apocalyptic number.

It is an amenable number.

38108689645 is a deficient number, since it is larger than the sum of its proper divisors (12770322035).

38108689645 is an equidigital number, since it uses as much as digits as its factorization.

38108689645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93842 (or 93816 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 58.

The spelling of 38108689645 in words is "thirty-eight billion, one hundred eight million, six hundred eighty-nine thousand, six hundred forty-five".