285444646157 has 16 divisors (see below), whose sum is σ = 322234113600. Its totient is φ = 250467517440.

The previous prime is 285444646139. The next prime is 285444646177. The reversal of 285444646157 is 751646444582.

It is a cyclic number.

It is not a de Polignac number, because 285444646157 - 2²⁸ = 285176210701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285444646177) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 876269 + ... + 1157037.

It is an arithmetic number, because the mean of its divisors is an integer number (20139632100).

Almost surely, 2^285444646157 is an apocalyptic number.

It is an amenable number.

285444646157 is a deficient number, since it is larger than the sum of its proper divisors (36789467443).

285444646157 is a wasteful number, since it uses less digits than its factorization.

285444646157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283996.

The product of its digits is 25804800, while the sum is 56.

The spelling of 285444646157 in words is "two hundred eighty-five billion, four hundred forty-four million, six hundred forty-six thousand, one hundred fifty-seven".