65723729551 has 2 divisors, whose sum is σ = 65723729552. Its totient is φ = 65723729550.

The previous prime is 65723729543. The next prime is 65723729569. The reversal of 65723729551 is 15592732756.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65723729551 - 2³ = 65723729543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65723729531) 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, 32861864775 + 32861864776.

It is an arithmetic number, because the mean of its divisors is an integer number (32861864776).

Almost surely, 2^65723729551 is an apocalyptic number.

65723729551 is a deficient number, since it is larger than the sum of its proper divisors (1).

65723729551 is an equidigital number, since it uses as much as digits as its factorization.

65723729551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3969000, while the sum is 52.

The spelling of 65723729551 in words is "sixty-five billion, seven hundred twenty-three million, seven hundred twenty-nine thousand, five hundred fifty-one".