65571568243 has 2 divisors, whose sum is σ = 65571568244. Its totient is φ = 65571568242.

The previous prime is 65571568199. The next prime is 65571568277. The reversal of 65571568243 is 34286517556.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65571568243 - 2¹³ = 65571560051 is a prime.

It is a super-2 number, since 2×65571568243² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (65571565243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32785784121 + 32785784122.

It is an arithmetic number, because the mean of its divisors is an integer number (32785784122).

Almost surely, 2^65571568243 is an apocalyptic number.

65571568243 is a deficient number, since it is larger than the sum of its proper divisors (1).

65571568243 is an equidigital number, since it uses as much as digits as its factorization.

65571568243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048000, while the sum is 52.

The spelling of 65571568243 in words is "sixty-five billion, five hundred seventy-one million, five hundred sixty-eight thousand, two hundred forty-three".