38256121573 has 2 divisors, whose sum is σ = 38256121574. Its totient is φ = 38256121572.

The previous prime is 38256121571. The next prime is 38256121591. The reversal of 38256121573 is 37512165283.

38256121573 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36692551809 + 1563569764 = 191553^2 + 39542^2 .

It is a cyclic number.

It is not a de Polignac number, because 38256121573 - 2¹ = 38256121571 is a prime.

Together with 38256121571, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38256121571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19128060786 + 19128060787.

It is an arithmetic number, because the mean of its divisors is an integer number (19128060787).

Almost surely, 2^38256121573 is an apocalyptic number.

It is an amenable number.

38256121573 is a deficient number, since it is larger than the sum of its proper divisors (1).

38256121573 is an equidigital number, since it uses as much as digits as its factorization.

38256121573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 302400, while the sum is 43.

The spelling of 38256121573 in words is "thirty-eight billion, two hundred fifty-six million, one hundred twenty-one thousand, five hundred seventy-three".