285678357145 has 4 divisors (see below), whose sum is σ = 342814028580. Its totient is φ = 228542685712.

The previous prime is 285678357121. The next prime is 285678357161. The reversal of 285678357145 is 541753876582.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 134951165449 + 150727191696 = 367357^2 + 388236^2 .

It is a cyclic number.

It is not a de Polignac number, because 285678357145 - 2⁷ = 285678357017 is a prime.

It is a super-2 number, since 2×285678357145² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28567835710 + ... + 28567835719.

It is an arithmetic number, because the mean of its divisors is an integer number (85703507145).

Almost surely, 2^285678357145 is an apocalyptic number.

It is an amenable number.

285678357145 is a deficient number, since it is larger than the sum of its proper divisors (57135671435).

285678357145 is an equidigital number, since it uses as much as digits as its factorization.

285678357145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57135671434.

The product of its digits is 56448000, while the sum is 61.

The spelling of 285678357145 in words is "two hundred eighty-five billion, six hundred seventy-eight million, three hundred fifty-seven thousand, one hundred forty-five".