254653665 has 64 divisors (see below), whose sum is σ = 481420800. Its totient is φ = 112527360.

The previous prime is 254653639. The next prime is 254653691. The reversal of 254653665 is 566356452.

It is an interprime number because it is at equal distance from previous prime (254653639) and next prime (254653691).

It is not a de Polignac number, because 254653665 - 2⁹ = 254653153 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 641247 + ... + 641643.

It is an arithmetic number, because the mean of its divisors is an integer number (7522200).

Almost surely, 2^254653665 is an apocalyptic number.

It is an amenable number.

254653665 is a deficient number, since it is larger than the sum of its proper divisors (226767135).

254653665 is a wasteful number, since it uses less digits than its factorization.

254653665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602.

The product of its digits is 648000, while the sum is 42.

The square root of 254653665 is about 15957.8715686021. The cubic root of 254653665 is about 633.8453524894.

The spelling of 254653665 in words is "two hundred fifty-four million, six hundred fifty-three thousand, six hundred sixty-five".