255609642 has 16 divisors (see below), whose sum is σ = 519600672. Its totient is φ = 83806320.

The previous prime is 255609631. The next prime is 255609701. The reversal of 255609642 is 246906552.

It is a self number, because there is not a number n which added to its sum of digits gives 255609642.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 348828 + ... + 349559.

It is an arithmetic number, because the mean of its divisors is an integer number (32475042).

Almost surely, 2^255609642 is an apocalyptic number.

255609642 is an abundant number, since it is smaller than the sum of its proper divisors (263991030).

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

255609642 is a wasteful number, since it uses less digits than its factorization.

255609642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 698453.

The product of its (nonzero) digits is 129600, while the sum is 39.

The square root of 255609642 is about 15987.7966587019. The cubic root of 255609642 is about 634.6375197851.

The spelling of 255609642 in words is "two hundred fifty-five million, six hundred nine thousand, six hundred forty-two".