6539633445 has 32 divisors (see below), whose sum is σ = 10542026880. Its totient is φ = 3461702400.

The previous prime is 6539633417. The next prime is 6539633459. The reversal of 6539633445 is 5443369356.

It is a happy number.

It is not a de Polignac number, because 6539633445 - 2⁶ = 6539633381 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6539633394 and 6539633403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1114770 + ... + 1120620.

It is an arithmetic number, because the mean of its divisors is an integer number (329438340).

Almost surely, 2^6539633445 is an apocalyptic number.

It is an amenable number.

6539633445 is a deficient number, since it is larger than the sum of its proper divisors (4002393435).

6539633445 is a wasteful number, since it uses less digits than its factorization.

6539633445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6405.

The product of its digits is 3499200, while the sum is 48.

The square root of 6539633445 is about 80868.0001298412. Note that the first 3 decimals coincide. The cubic root of 6539633445 is about 1870.0410302035.

The spelling of 6539633445 in words is "six billion, five hundred thirty-nine million, six hundred thirty-three thousand, four hundred forty-five".