3654655606221 has 4 divisors (see below), whose sum is σ = 4872874141632. Its totient is φ = 2436437070812.

The previous prime is 3654655606213. The next prime is 3654655606229. The reversal of 3654655606221 is 1226065564563.

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 an interprime number because it is at equal distance from previous prime (3654655606213) and next prime (3654655606229).

It is a cyclic number.

It is not a de Polignac number, because 3654655606221 - 2³ = 3654655606213 is a prime.

It is a super-3 number, since 3×3654655606221³ (a number of 39 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3654655606229) 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, 609109267701 + ... + 609109267706.

It is an arithmetic number, because the mean of its divisors is an integer number (1218218535408).

Almost surely, 2^{3654655606221} is an apocalyptic number.

It is an amenable number.

3654655606221 is a deficient number, since it is larger than the sum of its proper divisors (1218218535411).

3654655606221 is a wasteful number, since it uses less digits than its factorization.

3654655606221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1218218535410.

The product of its (nonzero) digits is 7776000, while the sum is 51.

The spelling of 3654655606221 in words is "three trillion, six hundred fifty-four billion, six hundred fifty-five million, six hundred six thousand, two hundred twenty-one".