6815431652 has 6 divisors (see below), whose sum is σ = 11927005398. Its totient is φ = 3407715824.

The previous prime is 6815431639. The next prime is 6815431657. The reversal of 6815431652 is 2561345186.

It can be written as a sum of positive squares in only one way, i.e., 6149069056 + 666362596 = 78416^2 + 25814^2 .

It is not an unprimeable number, because it can be changed into a prime (6815431657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 851928953 + ... + 851928960.

It is an arithmetic number, because the mean of its divisors is an integer number (1987834233).

Almost surely, 2^6815431652 is an apocalyptic number.

It is an amenable number.

6815431652 is a deficient number, since it is larger than the sum of its proper divisors (5111573746).

6815431652 is a wasteful number, since it uses less digits than its factorization.

6815431652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1703857917 (or 1703857915 counting only the distinct ones).

The product of its digits is 172800, while the sum is 41.

The square root of 6815431652 is about 82555.6276216225. The cubic root of 6815431652 is about 1895.9685204438.

The spelling of 6815431652 in words is "six billion, eight hundred fifteen million, four hundred thirty-one thousand, six hundred fifty-two".