65815651723 has 2 divisors, whose sum is σ = 65815651724. Its totient is φ = 65815651722.

The previous prime is 65815651703. The next prime is 65815651747. The reversal of 65815651723 is 32715651856.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65815651723 is a prime.

It is not a weakly prime, because it can be changed into another prime (65815651703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32907825861 + 32907825862.

It is an arithmetic number, because the mean of its divisors is an integer number (32907825862).

Almost surely, 2^65815651723 is an apocalyptic number.

65815651723 is a deficient number, since it is larger than the sum of its proper divisors (1).

65815651723 is an equidigital number, since it uses as much as digits as its factorization.

65815651723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512000, while the sum is 49.

The spelling of 65815651723 in words is "sixty-five billion, eight hundred fifteen million, six hundred fifty-one thousand, seven hundred twenty-three".