3642720243 has 16 divisors (see below), whose sum is σ = 5074953216. Its totient is φ = 2319768000.

The previous prime is 3642720241. The next prime is 3642720287. The reversal of 3642720243 is 3420272463.

It is not a de Polignac number, because 3642720243 - 2¹ = 3642720241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3642720241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16671 + ... + 86967.

It is an arithmetic number, because the mean of its divisors is an integer number (317184576).

Almost surely, 2^3642720243 is an apocalyptic number.

3642720243 is a deficient number, since it is larger than the sum of its proper divisors (1432232973).

3642720243 is a wasteful number, since it uses less digits than its factorization.

3642720243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71074.

The product of its (nonzero) digits is 48384, while the sum is 33.

The square root of 3642720243 is about 60354.9521000556. The cubic root of 3642720243 is about 1538.6574349184.

The spelling of 3642720243 in words is "three billion, six hundred forty-two million, seven hundred twenty thousand, two hundred forty-three".