65813906563 has 2 divisors, whose sum is σ = 65813906564. Its totient is φ = 65813906562.

The previous prime is 65813906507. The next prime is 65813906567. The reversal of 65813906563 is 36560931856.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65813906563 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65813906563.

It is not a weakly prime, because it can be changed into another prime (65813906567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32906953281 + 32906953282.

It is an arithmetic number, because the mean of its divisors is an integer number (32906953282).

Almost surely, 2^65813906563 is an apocalyptic number.

65813906563 is a deficient number, since it is larger than the sum of its proper divisors (1).

65813906563 is an equidigital number, since it uses as much as digits as its factorization.

65813906563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3499200, while the sum is 52.

The spelling of 65813906563 in words is "sixty-five billion, eight hundred thirteen million, nine hundred six thousand, five hundred sixty-three".