3639639546 has 24 divisors (see below), whose sum is σ = 7893359604. Its totient is φ = 1212063360.

The previous prime is 3639639541. The next prime is 3639639581. The reversal of 3639639546 is 6459369363.

It is a happy number.

3639639546 is a `hidden beast` number, since 3 + 6 + 3 + 96 + 3 + 9 + 546 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3594602025 + 45037521 = 59955^2 + 6711^2 .

It is a super-2 number, since 2×3639639546² = 26493952049614172232, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3639639492 and 3639639501.

It is not an unprimeable number, because it can be changed into a prime (3639639541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 76191 + ... + 114386.

Almost surely, 2^3639639546 is an apocalyptic number.

3639639546 is an abundant number, since it is smaller than the sum of its proper divisors (4253720058).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3639639546 is a wasteful number, since it uses less digits than its factorization.

3639639546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191646 (or 191643 counting only the distinct ones).

The product of its digits is 9447840, while the sum is 54.

The square root of 3639639546 is about 60329.4252085995. The cubic root of 3639639546 is about 1538.2235582254.

The spelling of 3639639546 in words is "three billion, six hundred thirty-nine million, six hundred thirty-nine thousand, five hundred forty-six".