1025505618 has 16 divisors (see below), whose sum is σ = 2081624160. Its totient is φ = 336733056.

The previous prime is 1025505589. The next prime is 1025505641. The reversal of 1025505618 is 8165055201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1275103 + ... + 1275906.

It is an arithmetic number, because the mean of its divisors is an integer number (130101510).

Almost surely, 2^1025505618 is an apocalyptic number.

1025505618 is an abundant number, since it is smaller than the sum of its proper divisors (1056118542).

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

1025505618 is a wasteful number, since it uses less digits than its factorization.

1025505618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2551081.

The product of its (nonzero) digits is 12000, while the sum is 33.

The square root of 1025505618 is about 32023.5166401193. The cubic root of 1025505618 is about 1008.4305979500.

The spelling of 1025505618 in words is "one billion, twenty-five million, five hundred five thousand, six hundred eighteen".