3643404081 has 16 divisors (see below), whose sum is σ = 4922054400. Its totient is φ = 2396878848.

The previous prime is 3643404077. The next prime is 3643404133. The reversal of 3643404081 is 1804043463.

It is a happy number.

It is not a de Polignac number, because 3643404081 - 2² = 3643404077 is a prime.

It is a super-2 number, since 2×3643404081² = 26548786594894909122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3643404001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 634435 + ... + 640151.

It is an arithmetic number, because the mean of its divisors is an integer number (307628400).

Almost surely, 2^3643404081 is an apocalyptic number.

It is an amenable number.

3643404081 is a deficient number, since it is larger than the sum of its proper divisors (1278650319).

3643404081 is a wasteful number, since it uses less digits than its factorization.

3643404081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8488.

The product of its (nonzero) digits is 27648, while the sum is 33.

The square root of 3643404081 is about 60360.6169700079. The cubic root of 3643404081 is about 1538.7537115577.

The spelling of 3643404081 in words is "three billion, six hundred forty-three million, four hundred four thousand, eighty-one".