3642125549 has 4 divisors (see below), whose sum is σ = 3678186300. Its totient is φ = 3606064800.

The previous prime is 3642125537. The next prime is 3642125567. The reversal of 3642125549 is 9455212463.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2093703049 + 1548422500 = 45757^2 + 39350^2 .

It is a cyclic number.

It is not a de Polignac number, because 3642125549 - 2¹² = 3642121453 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 (3642125579) 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, 18030224 + ... + 18030425.

It is an arithmetic number, because the mean of its divisors is an integer number (919546575).

Almost surely, 2^3642125549 is an apocalyptic number.

It is an amenable number.

3642125549 is a deficient number, since it is larger than the sum of its proper divisors (36060751).

3642125549 is a wasteful number, since it uses less digits than its factorization.

3642125549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36060750.

The product of its digits is 259200, while the sum is 41.

The square root of 3642125549 is about 60350.0252609723. The cubic root of 3642125549 is about 1538.5736989480.

The spelling of 3642125549 in words is "three billion, six hundred forty-two million, one hundred twenty-five thousand, five hundred forty-nine".