3642641235556 has 12 divisors (see below), whose sum is σ = 6383043068668. Its totient is φ = 1818914644512.

The previous prime is 3642641235523. The next prime is 3642641235557. The reversal of 3642641235556 is 6555321462463.

It can be written as a sum of positive squares in 2 ways, for example, as 3213472123456 + 429169112100 = 1792616^2 + 655110^2 .

It is not an unprimeable number, because it can be changed into a prime (3642641235557) 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, 601489911 + ... + 601495966.

Almost surely, 2^{3642641235556} is an apocalyptic number.

It is an amenable number.

3642641235556 is a deficient number, since it is larger than the sum of its proper divisors (2740401833112).

3642641235556 is a wasteful number, since it uses less digits than its factorization.

3642641235556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1202986638 (or 1202986636 counting only the distinct ones).

The product of its digits is 15552000, while the sum is 52.

The spelling of 3642641235556 in words is "three trillion, six hundred forty-two billion, six hundred forty-one million, two hundred thirty-five thousand, five hundred fifty-six".