6530247681 has 8 divisors (see below), whose sum is σ = 8987867904. Its totient is φ = 4213062960.

The previous prime is 6530247629. The next prime is 6530247683. The reversal of 6530247681 is 1867420356.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6530247681 - 2¹¹ = 6530245633 is a prime.

It is a super-2 number, since 2×6530247681² = 85288269550411755522, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6530247683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35108766 + ... + 35108951.

It is an arithmetic number, because the mean of its divisors is an integer number (1123483488).

Almost surely, 2^6530247681 is an apocalyptic number.

It is an amenable number.

6530247681 is a deficient number, since it is larger than the sum of its proper divisors (2457620223).

6530247681 is a wasteful number, since it uses less digits than its factorization.

6530247681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70217751.

The product of its (nonzero) digits is 241920, while the sum is 42.

The square root of 6530247681 is about 80809.9479086579. The cubic root of 6530247681 is about 1869.1459664120.

The spelling of 6530247681 in words is "six billion, five hundred thirty million, two hundred forty-seven thousand, six hundred eighty-one".