23515554709 has 2 divisors, whose sum is σ = 23515554710. Its totient is φ = 23515554708.

The previous prime is 23515554679. The next prime is 23515554749. The reversal of 23515554709 is 90745551532.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21740617809 + 1774936900 = 147447^2 + 42130^2 .

It is a cyclic number.

It is not a de Polignac number, because 23515554709 - 2²³ = 23507166101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23515554749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11757777354 + 11757777355.

It is an arithmetic number, because the mean of its divisors is an integer number (11757777355).

Almost surely, 2^23515554709 is an apocalyptic number.

It is an amenable number.

23515554709 is a deficient number, since it is larger than the sum of its proper divisors (1).

23515554709 is an equidigital number, since it uses as much as digits as its factorization.

23515554709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 945000, while the sum is 46.

The spelling of 23515554709 in words is "twenty-three billion, five hundred fifteen million, five hundred fifty-four thousand, seven hundred nine".