54390056439 has 4 divisors (see below), whose sum is σ = 72520075256. Its totient is φ = 36260037624.

The previous prime is 54390056401. The next prime is 54390056453. The reversal of 54390056439 is 93465009345.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 54390056439 - 2⁹ = 54390055927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54390056489) 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, 9065009404 + ... + 9065009409.

It is an arithmetic number, because the mean of its divisors is an integer number (18130018814).

Almost surely, 2^54390056439 is an apocalyptic number.

54390056439 is a deficient number, since it is larger than the sum of its proper divisors (18130018817).

54390056439 is a wasteful number, since it uses less digits than its factorization.

54390056439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18130018816.

The product of its (nonzero) digits is 1749600, while the sum is 48.

The spelling of 54390056439 in words is "fifty-four billion, three hundred ninety million, fifty-six thousand, four hundred thirty-nine".