23205530544457 has 2 divisors, whose sum is σ = 23205530544458. Its totient is φ = 23205530544456.

The previous prime is 23205530544439. The next prime is 23205530544479. The reversal of 23205530544457 is 75444503550232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23181249425481 + 24281118976 = 4814691^2 + 155824^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23205530544457 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23205530544457.

It is not a weakly prime, because it can be changed into another prime (23205530544487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11602765272228 + 11602765272229.

It is an arithmetic number, because the mean of its divisors is an integer number (11602765272229).

Almost surely, 2^{23205530544457} is an apocalyptic number.

It is an amenable number.

23205530544457 is a deficient number, since it is larger than the sum of its proper divisors (1).

23205530544457 is an equidigital number, since it uses as much as digits as its factorization.

23205530544457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080000, while the sum is 49.

The spelling of 23205530544457 in words is "twenty-three trillion, two hundred five billion, five hundred thirty million, five hundred forty-four thousand, four hundred fifty-seven".