54380840809 has 9 divisors (see below), whose sum is σ = 56853631933. Its totient is φ = 52011326092.

The previous prime is 54380840807. The next prime is 54380840837. The reversal of 54380840809 is 90804808345.

The square root of 54380840809 is 233197.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 54380840809 - 2¹ = 54380840807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54380840807) 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 8 ways as a sum of consecutive naturals, for example, 5358462 + ... + 5368600.

Almost surely, 2^54380840809 is an apocalyptic number.

54380840809 is the 233197-th square number.

54380840809 is the 116599-th centered octagonal number.

It is an amenable number.

54380840809 is a deficient number, since it is larger than the sum of its proper divisors (2472791124).

54380840809 is an frugal number, since it uses more digits than its factorization.

54380840809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20324 (or 10162 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 49.

Multiplying 54380840809 by its sum of digits (49), we get a square (2664661199641 = 1632379²).

The spelling of 54380840809 in words is "fifty-four billion, three hundred eighty million, eight hundred forty thousand, eight hundred nine".