255145661 has 8 divisors (see below), whose sum is σ = 269928000. Its totient is φ = 240498720.

The previous prime is 255145643. The next prime is 255145691. The reversal of 255145661 is 166541552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255145661 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255145691) 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, 29960 + ... + 37521.

It is an arithmetic number, because the mean of its divisors is an integer number (33741000).

Almost surely, 2^255145661 is an apocalyptic number.

It is an amenable number.

255145661 is a deficient number, since it is larger than the sum of its proper divisors (14782339).

255145661 is a wasteful number, since it uses less digits than its factorization.

255145661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67699.

The product of its digits is 36000, while the sum is 35.

The square root of 255145661 is about 15973.2795943726. The cubic root of 255145661 is about 634.2532905416.

The spelling of 255145661 in words is "two hundred fifty-five million, one hundred forty-five thousand, six hundred sixty-one".