54668521805 has 8 divisors (see below), whose sum is σ = 65613386232. Its totient is φ = 43727377408.

The previous prime is 54668521801. The next prime is 54668521811. The reversal of 54668521805 is 50812586645.

It can be written as a sum of positive squares in 4 ways, for example, as 2254540324 + 52413981481 = 47482^2 + 228941^2 .

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 54668521805 - 2² = 54668521801 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 (54668521801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 897572 + ... + 956541.

It is an arithmetic number, because the mean of its divisors is an integer number (8201673279).

Almost surely, 2^54668521805 is an apocalyptic number.

It is an amenable number.

54668521805 is a deficient number, since it is larger than the sum of its proper divisors (10944864427).

54668521805 is a wasteful number, since it uses less digits than its factorization.

54668521805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1860015.

The product of its (nonzero) digits is 2304000, while the sum is 50.

The spelling of 54668521805 in words is "fifty-four billion, six hundred sixty-eight million, five hundred twenty-one thousand, eight hundred five".