38638585489 has 9 divisors (see below), whose sum is σ = 44948526651. Its totient is φ = 33117608160.

The previous prime is 38638585457. The next prime is 38638585499. The reversal of 38638585489 is 98458583683.

The square root of 38638585489 is 196567.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 9561515089 + 29077070400 = 97783^2 + 170520^2 .

It is not a de Polignac number, because 38638585489 - 2⁵ = 38638585457 is a prime.

It is a super-2 number, since 2×38638585489² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (38638585499) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1361929 + ... + 1390009.

It is an arithmetic number, because the mean of its divisors is an integer number (4994280739).

Almost surely, 2^38638585489 is an apocalyptic number.

38638585489 is the 196567-th square number.

38638585489 is the 98284-th centered octagonal number.

It is an amenable number.

38638585489 is a deficient number, since it is larger than the sum of its proper divisors (6309941162).

38638585489 is an frugal number, since it uses more digits than its factorization.

38638585489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56176 (or 28088 counting only the distinct ones).

The product of its digits is 199065600, while the sum is 67.

The spelling of 38638585489 in words is "thirty-eight billion, six hundred thirty-eight million, five hundred eighty-five thousand, four hundred eighty-nine".