54123993691 has 8 divisors (see below), whose sum is σ = 56702225664. Its totient is φ = 51564513000.

The previous prime is 54123993689. The next prime is 54123993697. The reversal of 54123993691 is 19639932145.

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 54123993691 - 2¹ = 54123993689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54123993697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4681911 + ... + 4693456.

It is an arithmetic number, because the mean of its divisors is an integer number (7087778208).

Almost surely, 2^54123993691 is an apocalyptic number.

54123993691 is a deficient number, since it is larger than the sum of its proper divisors (2578231973).

54123993691 is a wasteful number, since it uses less digits than its factorization.

54123993691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9375641.

The product of its digits is 1574640, while the sum is 52.

The spelling of 54123993691 in words is "fifty-four billion, one hundred twenty-three million, nine hundred ninety-three thousand, six hundred ninety-one".