285518661982 has 16 divisors (see below), whose sum is σ = 428903258112. Its totient is φ = 142550997400.

The previous prime is 285518661977. The next prime is 285518662027. The reversal of 285518661982 is 289166815582.

It is a self number, because there is not a number n which added to its sum of digits gives 285518661982.

It is a congruent number.

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, 7342563 + ... + 7381345.

It is an arithmetic number, because the mean of its divisors is an integer number (26806453632).

Almost surely, 2^285518661982 is an apocalyptic number.

285518661982 is a deficient number, since it is larger than the sum of its proper divisors (143384596130).

285518661982 is a wasteful number, since it uses less digits than its factorization.

285518661982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44063.

The product of its digits is 16588800, while the sum is 61.

The spelling of 285518661982 in words is "two hundred eighty-five billion, five hundred eighteen million, six hundred sixty-one thousand, nine hundred eighty-two".