54171722889439 has 2 divisors, whose sum is σ = 54171722889440. Its totient is φ = 54171722889438.

The previous prime is 54171722889409. The next prime is 54171722889497. The reversal of 54171722889439 is 93498822717145.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 54171722889439 - 2³¹ = 54169575405791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54171722889409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27085861444719 + 27085861444720.

It is an arithmetic number, because the mean of its divisors is an integer number (27085861444720).

Almost surely, 2^{54171722889439} is an apocalyptic number.

54171722889439 is a deficient number, since it is larger than the sum of its proper divisors (1).

54171722889439 is an equidigital number, since it uses as much as digits as its factorization.

54171722889439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 243855360, while the sum is 70.

The spelling of 54171722889439 in words is "fifty-four trillion, one hundred seventy-one billion, seven hundred twenty-two million, eight hundred eighty-nine thousand, four hundred thirty-nine".