3634229781 has 32 divisors (see below), whose sum is σ = 6626520320. Its totient is φ = 1916955072.

The previous prime is 3634229761. The next prime is 3634229803. The reversal of 3634229781 is 1879224363.

3634229781 is a `hidden beast` number, since 3 + 63 + 422 + 97 + 81 = 666.

It is not a de Polignac number, because 3634229781 - 2²³ = 3625841173 is a prime.

It is a super-2 number, since 2×3634229781² = 26415252202214615922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3634229741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 737110 + ... + 742023.

It is an arithmetic number, because the mean of its divisors is an integer number (207078760).

Almost surely, 2^3634229781 is an apocalyptic number.

It is an amenable number.

3634229781 is a deficient number, since it is larger than the sum of its proper divisors (2992290539).

3634229781 is a wasteful number, since it uses less digits than its factorization.

3634229781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1479162 (or 1479156 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 3634229781 is about 60284.5733251883. The cubic root of 3634229781 is about 1537.4610693295.

The spelling of 3634229781 in words is "three billion, six hundred thirty-four million, two hundred twenty-nine thousand, seven hundred eighty-one".