654557849541 has 24 divisors (see below), whose sum is σ = 978150284280. Its totient is φ = 421292140416.

The previous prime is 654557849507. The next prime is 654557849549. The reversal of 654557849541 is 145948755456.

It is a happy number.

654557849541 is a `hidden beast` number, since 6 + 5 + 4 + 5 + 5 + 7 + 84 + 9 + 541 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 279995489316 + 374562360225 = 529146^2 + 612015^2 .

It is a de Polignac number, because none of the positive numbers 2^k-654557849541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (654557849549) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3563631 + ... + 3742803.

It is an arithmetic number, because the mean of its divisors is an integer number (40756261845).

Almost surely, 2^654557849541 is an apocalyptic number.

It is an amenable number.

654557849541 is a deficient number, since it is larger than the sum of its proper divisors (323592434739).

654557849541 is a wasteful number, since it uses less digits than its factorization.

654557849541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193205 (or 193202 counting only the distinct ones).

The product of its digits is 120960000, while the sum is 63.

The spelling of 654557849541 in words is "six hundred fifty-four billion, five hundred fifty-seven million, eight hundred forty-nine thousand, five hundred forty-one".