3643655672 has 8 divisors (see below), whose sum is σ = 6831854400. Its totient is φ = 1821827832.

The previous prime is 3643655657. The next prime is 3643655681. The reversal of 3643655672 is 2765563463.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 227728472 + ... + 227728487.

It is an arithmetic number, because the mean of its divisors is an integer number (853981800).

Almost surely, 2^3643655672 is an apocalyptic number.

It is an amenable number.

3643655672 is a deficient number, since it is larger than the sum of its proper divisors (3188198728).

3643655672 is a wasteful number, since it uses less digits than its factorization.

3643655672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455456965 (or 455456961 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 47.

The square root of 3643655672 is about 60362.7009998724. The cubic root of 3643655672 is about 1538.7891296873.

The spelling of 3643655672 in words is "three billion, six hundred forty-three million, six hundred fifty-five thousand, six hundred seventy-two".