254373459521 has 2 divisors, whose sum is σ = 254373459522. Its totient is φ = 254373459520.

The previous prime is 254373459437. The next prime is 254373459563. The reversal of 254373459521 is 125954373452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 162646857025 + 91726602496 = 403295^2 + 302864^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-254373459521 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 254373459521.

It is not a weakly prime, because it can be changed into another prime (254373459581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127186729760 + 127186729761.

It is an arithmetic number, because the mean of its divisors is an integer number (127186729761).

Almost surely, 2^254373459521 is an apocalyptic number.

It is an amenable number.

254373459521 is a deficient number, since it is larger than the sum of its proper divisors (1).

254373459521 is an equidigital number, since it uses as much as digits as its factorization.

254373459521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536000, while the sum is 50.

The spelling of 254373459521 in words is "two hundred fifty-four billion, three hundred seventy-three million, four hundred fifty-nine thousand, five hundred twenty-one".