3654763858221 has 16 divisors (see below), whose sum is σ = 5569200943104. Its totient is φ = 2088422627184.

The previous prime is 3654763858181. The next prime is 3654763858259. The reversal of 3654763858221 is 1228583674563.

It is not a de Polignac number, because 3654763858221 - 2⁶ = 3654763858157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3654763878221) 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, 3251580 + ... + 4228746.

It is an arithmetic number, because the mean of its divisors is an integer number (348075058944).

Almost surely, 2^{3654763858221} is an apocalyptic number.

It is an amenable number.

3654763858221 is a deficient number, since it is larger than the sum of its proper divisors (1914437084883).

3654763858221 is a wasteful number, since it uses less digits than its factorization.

3654763858221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1155280.

The product of its digits is 58060800, while the sum is 60.

The spelling of 3654763858221 in words is "three trillion, six hundred fifty-four billion, seven hundred sixty-three million, eight hundred fifty-eight thousand, two hundred twenty-one".