38291287109 has 4 divisors (see below), whose sum is σ = 38721526380. Its totient is φ = 37861047840.

The previous prime is 38291287093. The next prime is 38291287117. The reversal of 38291287109 is 90178219283.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90178219283 = 41 ⋅2199468763.

It can be written as a sum of positive squares in 2 ways, for example, as 16667584609 + 21623702500 = 129103^2 + 147050^2 .

It is a cyclic number.

It is not a de Polignac number, because 38291287109 - 2⁴ = 38291287093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38291287189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215119502 + ... + 215119679.

It is an arithmetic number, because the mean of its divisors is an integer number (9680381595).

Almost surely, 2^38291287109 is an apocalyptic number.

It is an amenable number.

38291287109 is a deficient number, since it is larger than the sum of its proper divisors (430239271).

38291287109 is an equidigital number, since it uses as much as digits as its factorization.

38291287109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430239270.

The product of its (nonzero) digits is 435456, while the sum is 50.

The spelling of 38291287109 in words is "thirty-eight billion, two hundred ninety-one million, two hundred eighty-seven thousand, one hundred nine".