54887478845 has 4 divisors (see below), whose sum is σ = 65864974620. Its totient is φ = 43909983072.

The previous prime is 54887478817. The next prime is 54887478851.

54887478845 is nontrivially palindromic in base 10.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6419695129 + 48467783716 = 80123^2 + 220154^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54887478845 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5488747880 + ... + 5488747889.

It is an arithmetic number, because the mean of its divisors is an integer number (16466243655).

Almost surely, 2^54887478845 is an apocalyptic number.

It is an amenable number.

54887478845 is a deficient number, since it is larger than the sum of its proper divisors (10977495775).

54887478845 is a wasteful number, since it uses less digits than its factorization.

54887478845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10977495774.

The product of its digits is 321126400, while the sum is 68.

The spelling of 54887478845 in words is "fifty-four billion, eight hundred eighty-seven million, four hundred seventy-eight thousand, eight hundred forty-five".