38489511881 has 4 divisors (see below), whose sum is σ = 38496401664. Its totient is φ = 38482622100.

The previous prime is 38489511833. The next prime is 38489511887. The reversal of 38489511881 is 18811598483.

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 not a de Polignac number, because 38489511881 - 2⁶ = 38489511817 is a prime.

It is a super-2 number, since 2×38489511881² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38489511887) 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, 3436505 + ... + 3447686.

It is an arithmetic number, because the mean of its divisors is an integer number (9624100416).

Almost surely, 2^38489511881 is an apocalyptic number.

It is an amenable number.

38489511881 is a deficient number, since it is larger than the sum of its proper divisors (6889783).

38489511881 is an equidigital number, since it uses as much as digits as its factorization.

38489511881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6889782.

The product of its digits is 2211840, while the sum is 56.

The spelling of 38489511881 in words is "thirty-eight billion, four hundred eighty-nine million, five hundred eleven thousand, eight hundred eighty-one".