285642470421 has 48 divisors (see below), whose sum is σ = 514708646400. Its totient is φ = 148297750560.

The previous prime is 285642470419. The next prime is 285642470429. The reversal of 285642470421 is 124074246582.

285642470421 is a `hidden beast` number, since 2 + 8 + 564 + 2 + 47 + 0 + 42 + 1 = 666.

It is not a de Polignac number, because 285642470421 - 2¹ = 285642470419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285642470429) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1056106 + ... + 1298708.

It is an arithmetic number, because the mean of its divisors is an integer number (10723096800).

Almost surely, 2^285642470421 is an apocalyptic number.

285642470421 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

285642470421 is a deficient number, since it is larger than the sum of its proper divisors (229066175979).

285642470421 is a wasteful number, since it uses less digits than its factorization.

285642470421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244326 (or 244323 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 45.

The spelling of 285642470421 in words is "two hundred eighty-five billion, six hundred forty-two million, four hundred seventy thousand, four hundred twenty-one".