23534155409 has 2 divisors, whose sum is σ = 23534155410. Its totient is φ = 23534155408.

The previous prime is 23534155387. The next prime is 23534155439. The reversal of 23534155409 is 90455143532.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12668177809 + 10865977600 = 112553^2 + 104240^2 .

It is a cyclic number.

It is not a de Polignac number, because 23534155409 - 2¹² = 23534151313 is a prime.

It is not a weakly prime, because it can be changed into another prime (23534155439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11767077704 + 11767077705.

It is an arithmetic number, because the mean of its divisors is an integer number (11767077705).

Almost surely, 2^23534155409 is an apocalyptic number.

It is an amenable number.

23534155409 is a deficient number, since it is larger than the sum of its proper divisors (1).

23534155409 is an equidigital number, since it uses as much as digits as its factorization.

23534155409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324000, while the sum is 41.

The spelling of 23534155409 in words is "twenty-three billion, five hundred thirty-four million, one hundred fifty-five thousand, four hundred nine".