38719043809 has 12 divisors (see below), whose sum is σ = 40885056660. Its totient is φ = 36662427360.

The previous prime is 38719043807. The next prime is 38719043851. The reversal of 38719043809 is 90834091783.

It can be written as a sum of positive squares in 2 ways, for example, as 34071622225 + 4647421584 = 184585^2 + 68172^2 .

It is not a de Polignac number, because 38719043809 - 2¹ = 38719043807 is a prime.

It is a super-2 number, since 2×38719043809² (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 (38719043807) 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 11 ways as a sum of consecutive naturals, for example, 706039 + ... + 758899.

It is an arithmetic number, because the mean of its divisors is an integer number (3407088055).

Almost surely, 2^38719043809 is an apocalyptic number.

It is an amenable number.

38719043809 is a deficient number, since it is larger than the sum of its proper divisors (2166012851).

38719043809 is a wasteful number, since it uses less digits than its factorization.

38719043809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54928 (or 54909 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 52.

The spelling of 38719043809 in words is "thirty-eight billion, seven hundred nineteen million, forty-three thousand, eight hundred nine".