3603786381 has 12 divisors (see below), whose sum is σ = 5605890108. Its totient is φ = 2217714624.

The previous prime is 3603786377. The next prime is 3603786383. The reversal of 3603786381 is 1836873063.

3603786381 is a `hidden beast` number, since 3 + 6 + 0 + 3 + 7 + 8 + 638 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1257837156 + 2345949225 = 35466^2 + 48435^2 .

It is not a de Polignac number, because 3603786381 - 2² = 3603786377 is a prime.

It is a super-2 number, since 2×3603786381² = 25974552559762154322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3603786383) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15400680 + ... + 15400913.

It is an arithmetic number, because the mean of its divisors is an integer number (467157509).

Almost surely, 2^3603786381 is an apocalyptic number.

It is an amenable number.

3603786381 is a deficient number, since it is larger than the sum of its proper divisors (2002103727).

3603786381 is a wasteful number, since it uses less digits than its factorization.

3603786381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30801612 (or 30801609 counting only the distinct ones).

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

The square root of 3603786381 is about 60031.5448826698. The cubic root of 3603786381 is about 1533.1559986419.

The spelling of 3603786381 in words is "three billion, six hundred three million, seven hundred eighty-six thousand, three hundred eighty-one".