655555149 has 12 divisors (see below), whose sum is σ = 955294236. Its totient is φ = 433168512.

The previous prime is 655555123. The next prime is 655555169. The reversal of 655555149 is 941555556.

655555149 is a `hidden beast` number, since 6 + 5 + 55 + 551 + 49 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 274134249 + 381420900 = 16557^2 + 19530^2 .

It is not a de Polignac number, because 655555149 - 2¹⁵ = 655522381 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655555169) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 321282 + ... + 323315.

It is an arithmetic number, because the mean of its divisors is an integer number (79607853).

Almost surely, 2^655555149 is an apocalyptic number.

It is an amenable number.

655555149 is a deficient number, since it is larger than the sum of its proper divisors (299739087).

655555149 is a wasteful number, since it uses less digits than its factorization.

655555149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644716 (or 644713 counting only the distinct ones).

The product of its digits is 675000, while the sum is 45.

The square root of 655555149 is about 25603.8112202070. The cubic root of 655555149 is about 868.6998455320.

The spelling of 655555149 in words is "six hundred fifty-five million, five hundred fifty-five thousand, one hundred forty-nine".