38481491889 has 27 divisors (see below), whose sum is σ = 58126609177. Its totient is φ = 24530291016.

The previous prime is 38481491809. The next prime is 38481491897. The reversal of 38481491889 is 98819418483.

The square root of 38481491889 is 196167.

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

38481491889 is a `hidden beast` number, since 38 + 481 + 49 + 1 + 8 + 89 = 666.

It is not a de Polignac number, because 38481491889 - 2²³ = 38473103281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38481491809) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 13534102 + ... + 13536944.

Almost surely, 2^38481491889 is an apocalyptic number.

38481491889 is the 196167-th square number.

38481491889 is the 98084-th centered octagonal number.

It is an amenable number.

38481491889 is a deficient number, since it is larger than the sum of its proper divisors (19645117288).

38481491889 is an frugal number, since it uses more digits than its factorization.

38481491889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5738 (or 2869 counting only the distinct ones).

The product of its digits is 15925248, while the sum is 63.

The spelling of 38481491889 in words is "thirty-eight billion, four hundred eighty-one million, four hundred ninety-one thousand, eight hundred eighty-nine".