4285181781 has 18 divisors (see below), whose sum is σ = 6410516450. Its totient is φ = 2758273056.

The previous prime is 4285181749. The next prime is 4285181827. The reversal of 4285181781 is 1871815824.

4285181781 is a `hidden beast` number, since 42 + 8 + 518 + 17 + 81 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 1007046756 + 3278135025 = 31734^2 + 57255^2 .

It is not a de Polignac number, because 4285181781 - 2⁵ = 4285181749 is a prime.

It is a super-2 number, since 2×4285181781² = 36725565792428663922, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4285181731) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 275506 + ... + 290643.

Almost surely, 2^4285181781 is an apocalyptic number.

It is an amenable number.

4285181781 is a deficient number, since it is larger than the sum of its proper divisors (2125334669).

4285181781 is a wasteful number, since it uses less digits than its factorization.

4285181781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566213 (or 566181 counting only the distinct ones).

The product of its digits is 143360, while the sum is 45.

The square root of 4285181781 is about 65461.2998725201. The cubic root of 4285181781 is about 1624.2632438915.

The spelling of 4285181781 in words is "four billion, two hundred eighty-five million, one hundred eighty-one thousand, seven hundred eighty-one".