3651561441 has 12 divisors (see below), whose sum is σ = 5753975760. Its totient is φ = 2213067480.

The previous prime is 3651561409. The next prime is 3651561499. The reversal of 3651561441 is 1441651563.

3651561441 is a `hidden beast` number, since 3 + 6 + 51 + 561 + 4 + 41 = 666.

It is not a de Polignac number, because 3651561441 - 2⁵ = 3651561409 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3651561396 and 3651561405.

It is not an unprimeable number, because it can be changed into a prime (3651561401) 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, 18442131 + ... + 18442328.

It is an arithmetic number, because the mean of its divisors is an integer number (479497980).

Almost surely, 2^3651561441 is an apocalyptic number.

It is an amenable number.

3651561441 is a deficient number, since it is larger than the sum of its proper divisors (2102414319).

3651561441 is a wasteful number, since it uses less digits than its factorization.

3651561441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36884476 (or 36884473 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 3651561441 is about 60428.1510638874. The cubic root of 3651561441 is about 1539.9012475328.

The spelling of 3651561441 in words is "three billion, six hundred fifty-one million, five hundred sixty-one thousand, four hundred forty-one".