65435907989 has 2 divisors, whose sum is σ = 65435907990. Its totient is φ = 65435907988.

The previous prime is 65435907941. The next prime is 65435907991. The reversal of 65435907989 is 98970953456.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45301716964 + 20134191025 = 212842^2 + 141895^2 .

It is a cyclic number.

It is not a de Polignac number, because 65435907989 - 2¹² = 65435903893 is a prime.

Together with 65435907991, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65435900989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32717953994 + 32717953995.

It is an arithmetic number, because the mean of its divisors is an integer number (32717953995).

Almost surely, 2^65435907989 is an apocalyptic number.

It is an amenable number.

65435907989 is a deficient number, since it is larger than the sum of its proper divisors (1).

65435907989 is an equidigital number, since it uses as much as digits as its factorization.

65435907989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 73483200, while the sum is 65.

The spelling of 65435907989 in words is "sixty-five billion, four hundred thirty-five million, nine hundred seven thousand, nine hundred eighty-nine".