54319773891 has 4 divisors (see below), whose sum is σ = 72426365192. Its totient is φ = 36213182592.

The previous prime is 54319773887. The next prime is 54319773931. The reversal of 54319773891 is 19837791345.

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

It is not a de Polignac number, because 54319773891 - 2² = 54319773887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54319703891) 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, 9053295646 + ... + 9053295651.

It is an arithmetic number, because the mean of its divisors is an integer number (18106591298).

Almost surely, 2^54319773891 is an apocalyptic number.

54319773891 is a deficient number, since it is larger than the sum of its proper divisors (18106591301).

54319773891 is a wasteful number, since it uses less digits than its factorization.

54319773891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18106591300.

The product of its digits is 5715360, while the sum is 57.

The spelling of 54319773891 in words is "fifty-four billion, three hundred nineteen million, seven hundred seventy-three thousand, eight hundred ninety-one".