54685658645 has 4 divisors (see below), whose sum is σ = 65622790380. Its totient is φ = 43748526912.

The previous prime is 54685658641. The next prime is 54685658653.

It is a happy number.

54685658645 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 7658700196 + 47026958449 = 87514^2 + 216857^2 .

It is a cyclic number.

It is not a de Polignac number, because 54685658645 - 2² = 54685658641 is a prime.

It is a super-2 number, since 2×54685658645² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54685658641) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 5468565860 + ... + 5468565869.

It is an arithmetic number, because the mean of its divisors is an integer number (16405697595).

Almost surely, 2^54685658645 is an apocalyptic number.

It is an amenable number.

54685658645 is a deficient number, since it is larger than the sum of its proper divisors (10937131735).

54685658645 is a wasteful number, since it uses less digits than its factorization.

54685658645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10937131734.

The product of its digits is 138240000, while the sum is 62.

The spelling of 54685658645 in words is "fifty-four billion, six hundred eighty-five million, six hundred fifty-eight thousand, six hundred forty-five".