6523640761 has 4 divisors (see below), whose sum is σ = 7116699024. Its totient is φ = 5930582500.

The previous prime is 6523640759. The next prime is 6523640771. The reversal of 6523640761 is 1670463256.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6523640761 - 2¹ = 6523640759 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6523640701) 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 in 3 ways as a sum of consecutive naturals, for example, 296529115 + ... + 296529136.

It is an arithmetic number, because the mean of its divisors is an integer number (1779174756).

Almost surely, 2^6523640761 is an apocalyptic number.

It is an amenable number.

6523640761 is a deficient number, since it is larger than the sum of its proper divisors (593058263).

6523640761 is a wasteful number, since it uses less digits than its factorization.

6523640761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593058262.

The product of its (nonzero) digits is 181440, while the sum is 40.

The square root of 6523640761 is about 80769.0581906215. The cubic root of 6523640761 is about 1868.5153897693.

The spelling of 6523640761 in words is "six billion, five hundred twenty-three million, six hundred forty thousand, seven hundred sixty-one".