285768174421 has 4 divisors (see below), whose sum is σ = 302578067052. Its totient is φ = 268958281792.

The previous prime is 285768174407. The next prime is 285768174443. The reversal of 285768174421 is 124471867582.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124471867582 = 2 ⋅62235933791.

It can be written as a sum of positive squares in 2 ways, for example, as 233458080625 + 52310093796 = 483175^2 + 228714^2 .

It is a cyclic number.

It is not a de Polignac number, because 285768174421 - 2²¹ = 285766077269 is a prime.

It is a super-2 number, since 2×285768174421² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285768174481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8404946290 + ... + 8404946323.

It is an arithmetic number, because the mean of its divisors is an integer number (75644516763).

Almost surely, 2^285768174421 is an apocalyptic number.

It is an amenable number.

285768174421 is a deficient number, since it is larger than the sum of its proper divisors (16809892631).

285768174421 is a wasteful number, since it uses less digits than its factorization.

285768174421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16809892630.

The product of its digits is 6021120, while the sum is 55.

The spelling of 285768174421 in words is "two hundred eighty-five billion, seven hundred sixty-eight million, one hundred seventy-four thousand, four hundred twenty-one".