54851566515845 has 16 divisors (see below), whose sum is σ = 71810385349248. Its totient is φ = 39889438223040.

The previous prime is 54851566515829. The next prime is 54851566515853.

54851566515845 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 54851566515845 - 2⁴ = 54851566515829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 31778474 + ... + 33460043.

It is an arithmetic number, because the mean of its divisors is an integer number (4488149084328).

Almost surely, 2^{54851566515845} is an apocalyptic number.

54851566515845 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

54851566515845 is a deficient number, since it is larger than the sum of its proper divisors (16958818833403).

54851566515845 is a wasteful number, since it uses less digits than its factorization.

54851566515845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65253820.

The product of its digits is 576000000, while the sum is 68.

The spelling of 54851566515845 in words is "fifty-four trillion, eight hundred fifty-one billion, five hundred sixty-six million, five hundred fifteen thousand, eight hundred forty-five".