1285434485918 has 64 divisors (see below), whose sum is σ = 2193862662144. Its totient is φ = 559567920000.

The previous prime is 1285434485917. The next prime is 1285434485927. The reversal of 1285434485918 is 8195844345821.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (62).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285434485917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 212360180 + ... + 212366232.

It is an arithmetic number, because the mean of its divisors is an integer number (34279104096).

Almost surely, 2^{1285434485918} is an apocalyptic number.

1285434485918 is a deficient number, since it is larger than the sum of its proper divisors (908428176226).

1285434485918 is a wasteful number, since it uses less digits than its factorization.

1285434485918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9281.

The product of its digits is 44236800, while the sum is 62.

The spelling of 1285434485918 in words is "one trillion, two hundred eighty-five billion, four hundred thirty-four million, four hundred eighty-five thousand, nine hundred eighteen".