38534867809 has 3 divisors (see below), whose sum is σ = 38535064113. Its totient is φ = 38534671506.

The previous prime is 38534867779. The next prime is 38534867821. The reversal of 38534867809 is 90876843583.

The square root of 38534867809 is 196303.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a de Polignac number, because none of the positive numbers 2^k-38534867809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38534867849) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 98152 + ... + 294454.

It is an arithmetic number, because the mean of its divisors is an integer number (12845021371).

Almost surely, 2^38534867809 is an apocalyptic number.

38534867809 is the 196303-rd square number.

38534867809 is the 98152-nd centered octagonal number.

It is an amenable number.

38534867809 is a deficient number, since it is larger than the sum of its proper divisors (196304).

38534867809 is an frugal number, since it uses more digits than its factorization.

38534867809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392606 (or 196303 counting only the distinct ones).

The product of its (nonzero) digits is 34836480, while the sum is 61.

The spelling of 38534867809 in words is "thirty-eight billion, five hundred thirty-four million, eight hundred sixty-seven thousand, eight hundred nine".