23890745653 has 2 divisors, whose sum is σ = 23890745654. Its totient is φ = 23890745652.

The previous prime is 23890745651. The next prime is 23890745663. The reversal of 23890745653 is 35654709832.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13192360164 + 10698385489 = 114858^2 + 103433^2 .

It is a cyclic number.

It is not a de Polignac number, because 23890745653 - 2¹ = 23890745651 is a prime.

Together with 23890745651, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 23890745653.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23890745651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11945372826 + 11945372827.

It is an arithmetic number, because the mean of its divisors is an integer number (11945372827).

Almost surely, 2^23890745653 is an apocalyptic number.

It is an amenable number.

23890745653 is a deficient number, since it is larger than the sum of its proper divisors (1).

23890745653 is an equidigital number, since it uses as much as digits as its factorization.

23890745653 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5443200, while the sum is 52.

The spelling of 23890745653 in words is "twenty-three billion, eight hundred ninety million, seven hundred forty-five thousand, six hundred fifty-three".