54109878391 has 8 divisors (see below), whose sum is σ = 57389438304. Its totient is φ = 50841054720.

The previous prime is 54109878359. The next prime is 54109878401. The reversal of 54109878391 is 19387890145.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 54109878391 - 2⁵ = 54109878359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54109878311) 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 7 ways as a sum of consecutive naturals, for example, 2673675 + ... + 2693836.

It is an arithmetic number, because the mean of its divisors is an integer number (7173679788).

Almost surely, 2^54109878391 is an apocalyptic number.

54109878391 is a deficient number, since it is larger than the sum of its proper divisors (3279559913).

54109878391 is a wasteful number, since it uses less digits than its factorization.

54109878391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5368121.

The product of its (nonzero) digits is 2177280, while the sum is 55.

The spelling of 54109878391 in words is "fifty-four billion, one hundred nine million, eight hundred seventy-eight thousand, three hundred ninety-one".