38779025869 has 4 divisors (see below), whose sum is σ = 40465070496. Its totient is φ = 37092981244.

The previous prime is 38779025867. The next prime is 38779025893. The reversal of 38779025869 is 96852097783.

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, and also an emirpimes, since its reverse is a distinct semiprime: 96852097783 = 7 ⋅13836013969.

It is a cyclic number.

It is not a de Polignac number, because 38779025869 - 2¹ = 38779025867 is a prime.

It is a super-2 number, since 2×38779025869² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 38779025869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38779025867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 843022279 + ... + 843022324.

It is an arithmetic number, because the mean of its divisors is an integer number (10116267624).

Almost surely, 2^38779025869 is an apocalyptic number.

It is an amenable number.

38779025869 is a deficient number, since it is larger than the sum of its proper divisors (1686044627).

38779025869 is a wasteful number, since it uses less digits than its factorization.

38779025869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1686044626.

The product of its (nonzero) digits is 45722880, while the sum is 64.

The spelling of 38779025869 in words is "thirty-eight billion, seven hundred seventy-nine million, twenty-five thousand, eight hundred sixty-nine".