3645220701 has 4 divisors (see below), whose sum is σ = 4860294272. Its totient is φ = 2430147132.

The previous prime is 3645220687. The next prime is 3645220703. The reversal of 3645220701 is 1070225463.

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 not a de Polignac number, because 3645220701 - 2⁵ = 3645220669 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 (3645220703) 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, 607536781 + ... + 607536786.

It is an arithmetic number, because the mean of its divisors is an integer number (1215073568).

Almost surely, 2^3645220701 is an apocalyptic number.

It is an amenable number.

3645220701 is a deficient number, since it is larger than the sum of its proper divisors (1215073571).

3645220701 is a wasteful number, since it uses less digits than its factorization.

3645220701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1215073570.

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 3645220701 is about 60375.6631516375. The cubic root of 3645220701 is about 1539.0094125674.

The spelling of 3645220701 in words is "three billion, six hundred forty-five million, two hundred twenty thousand, seven hundred one".