255017664 has 126 divisors (see below), whose sum is σ = 803673780. Its totient is φ = 77256960.

The previous prime is 255017621. The next prime is 255017669. The reversal of 255017664 is 466710552.

It is a happy number.

255017664 is a `hidden beast` number, since 25 + 501 + 76 + 64 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (255017669) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 67867 + ... + 71525.

Almost surely, 2^255017664 is an apocalyptic number.

255017664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 255017664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (401836890).

255017664 is an abundant number, since it is smaller than the sum of its proper divisors (548656116).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

255017664 is a wasteful number, since it uses less digits than its factorization.

255017664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3699 (or 3675 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 255017664 is about 15969.2724943875. The cubic root of 255017664 is about 634.1472124458.

The spelling of 255017664 in words is "two hundred fifty-five million, seventeen thousand, six hundred sixty-four".