38957721869 has 8 divisors (see below), whose sum is σ = 43011374112. Its totient is φ = 34989409840.

The previous prime is 38957721857. The next prime is 38957721871. The reversal of 38957721869 is 96812775983.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 38957721869 - 2²⁸ = 38689286413 is a prime.

It is a super-2 number, since 2×38957721869² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38957721769) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21334094 + ... + 21335919.

It is an arithmetic number, because the mean of its divisors is an integer number (5376421764).

Almost surely, 2^38957721869 is an apocalyptic number.

It is an amenable number.

38957721869 is a deficient number, since it is larger than the sum of its proper divisors (4053652243).

38957721869 is a wasteful number, since it uses less digits than its factorization.

38957721869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42670107.

The product of its digits is 45722880, while the sum is 65.

The spelling of 38957721869 in words is "thirty-eight billion, nine hundred fifty-seven million, seven hundred twenty-one thousand, eight hundred sixty-nine".