3655434206221 has 8 divisors (see below), whose sum is σ = 4179396637760. Its totient is φ = 3131911160928.

The previous prime is 3655434206191. The next prime is 3655434206233. The reversal of 3655434206221 is 1226024345563.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3655434206221 - 2⁵ = 3655434206189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3655434206521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109828731 + ... + 109862008.

It is an arithmetic number, because the mean of its divisors is an integer number (522424579720).

Almost surely, 2^{3655434206221} is an apocalyptic number.

It is an amenable number.

3655434206221 is a deficient number, since it is larger than the sum of its proper divisors (523962431539).

3655434206221 is a wasteful number, since it uses less digits than its factorization.

3655434206221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219693123.

The product of its (nonzero) digits is 1036800, while the sum is 43.

The spelling of 3655434206221 in words is "three trillion, six hundred fifty-five billion, four hundred thirty-four million, two hundred six thousand, two hundred twenty-one".