3639523849 has 16 divisors (see below), whose sum is σ = 3962812672. Its totient is φ = 3322513728.

The previous prime is 3639523847. The next prime is 3639523961. The reversal of 3639523849 is 9483259363.

It is a cyclic number.

It is not a de Polignac number, because 3639523849 - 2¹ = 3639523847 is a prime.

It is a super-2 number, since 2×3639523849² = 26492267694879549602, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3639523796 and 3639523805.

It is not an unprimeable number, because it can be changed into a prime (3639523847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1422079 + ... + 1424635.

It is an arithmetic number, because the mean of its divisors is an integer number (247675792).

Almost surely, 2^3639523849 is an apocalyptic number.

It is an amenable number.

3639523849 is a deficient number, since it is larger than the sum of its proper divisors (323288823).

3639523849 is a wasteful number, since it uses less digits than its factorization.

3639523849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3736.

The product of its digits is 4199040, while the sum is 52.

The square root of 3639523849 is about 60328.4663239503. The cubic root of 3639523849 is about 1538.2072590165.

The spelling of 3639523849 in words is "three billion, six hundred thirty-nine million, five hundred twenty-three thousand, eight hundred forty-nine".