3643667774641 has 4 divisors (see below), whose sum is σ = 3835439762800. Its totient is φ = 3451895786484.

The previous prime is 3643667774633. The next prime is 3643667774657. The reversal of 3643667774641 is 1464777663463.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3643667774641 - 2³ = 3643667774633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3643667774741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95885994051 + ... + 95885994088.

It is an arithmetic number, because the mean of its divisors is an integer number (958859940700).

Almost surely, 2^{3643667774641} is an apocalyptic number.

It is an amenable number.

3643667774641 is a deficient number, since it is larger than the sum of its proper divisors (191771988159).

3643667774641 is a wasteful number, since it uses less digits than its factorization.

3643667774641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191771988158.

The product of its digits is 256048128, while the sum is 64.

The spelling of 3643667774641 in words is "three trillion, six hundred forty-three billion, six hundred sixty-seven million, seven hundred seventy-four thousand, six hundred forty-one".