6539309956 has 9 divisors (see below), whose sum is σ = 11444075461. Its totient is φ = 3269574112.

The previous prime is 6539309951. The next prime is 6539309957. The reversal of 6539309956 is 6599039356.

It is a happy number.

The square root of 6539309956 is 80866.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 941876100 + 5597433856 = 30690^2 + 74816^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6539309897 and 6539309906.

It is not an unprimeable number, because it can be changed into a prime (6539309951) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 141516 + ... + 181948.

Almost surely, 2^6539309956 is an apocalyptic number.

6539309956 is the 80866-th square number.

It is an amenable number.

6539309956 is a deficient number, since it is larger than the sum of its proper divisors (4904765505).

6539309956 is an frugal number, since it uses more digits than its factorization.

6539309956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80870 (or 40435 counting only the distinct ones).

The product of its (nonzero) digits is 5904900, while the sum is 55.

The cubic root of 6539309956 is about 1870.0101952603.

The spelling of 6539309956 in words is "six billion, five hundred thirty-nine million, three hundred nine thousand, nine hundred fifty-six".