65815651747 has 2 divisors, whose sum is σ = 65815651748. Its totient is φ = 65815651746.

The previous prime is 65815651723. The next prime is 65815651751. The reversal of 65815651747 is 74715651856.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65815651747 - 2⁷ = 65815651619 is a prime.

It is not a weakly prime, because it can be changed into another prime (65815651547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32907825873 + 32907825874.

It is an arithmetic number, because the mean of its divisors is an integer number (32907825874).

Almost surely, 2^65815651747 is an apocalyptic number.

65815651747 is a deficient number, since it is larger than the sum of its proper divisors (1).

65815651747 is an equidigital number, since it uses as much as digits as its factorization.

65815651747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7056000, while the sum is 55.

The spelling of 65815651747 in words is "sixty-five billion, eight hundred fifteen million, six hundred fifty-one thousand, seven hundred forty-seven".