9505641623 has 2 divisors, whose sum is σ = 9505641624. Its totient is φ = 9505641622.

The previous prime is 9505641599. The next prime is 9505641661. The reversal of 9505641623 is 3261465059.

It is a weak prime.

It is an emirp because it is prime and its reverse (3261465059) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9505641623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9505641923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4752820811 + 4752820812.

It is an arithmetic number, because the mean of its divisors is an integer number (4752820812).

Almost surely, 2^9505641623 is an apocalyptic number.

9505641623 is a deficient number, since it is larger than the sum of its proper divisors (1).

9505641623 is an equidigital number, since it uses as much as digits as its factorization.

9505641623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 194400, while the sum is 41.

The square root of 9505641623 is about 97496.8800680309. The cubic root of 9505641623 is about 2118.3309533710.

The spelling of 9505641623 in words is "nine billion, five hundred five million, six hundred forty-one thousand, six hundred twenty-three".