38775072129 has 4 divisors (see below), whose sum is σ = 51700096176. Its totient is φ = 25850048084.

The previous prime is 38775072101. The next prime is 38775072131. The reversal of 38775072129 is 92127057783.

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: 92127057783 = 3 ⋅30709019261.

It is a cyclic number.

It is not a de Polignac number, because 38775072129 - 2¹⁶ = 38775006593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (38775072139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6462512019 + ... + 6462512024.

It is an arithmetic number, because the mean of its divisors is an integer number (12925024044).

Almost surely, 2^38775072129 is an apocalyptic number.

It is an amenable number.

38775072129 is a deficient number, since it is larger than the sum of its proper divisors (12925024047).

38775072129 is a wasteful number, since it uses less digits than its factorization.

38775072129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12925024046.

The product of its (nonzero) digits is 1481760, while the sum is 51.

The spelling of 38775072129 in words is "thirty-eight billion, seven hundred seventy-five million, seventy-two thousand, one hundred twenty-nine".