254720380457 has 2 divisors, whose sum is σ = 254720380458. Its totient is φ = 254720380456.

The previous prime is 254720380433. The next prime is 254720380463. The reversal of 254720380457 is 754083027452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 203419942441 + 51300438016 = 451021^2 + 226496^2 .

It is a cyclic number.

It is not a de Polignac number, because 254720380457 - 2¹⁶ = 254720314921 is a prime.

It is not a weakly prime, because it can be changed into another prime (254720380417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127360190228 + 127360190229.

It is an arithmetic number, because the mean of its divisors is an integer number (127360190229).

Almost surely, 2^254720380457 is an apocalyptic number.

It is an amenable number.

254720380457 is a deficient number, since it is larger than the sum of its proper divisors (1).

254720380457 is an equidigital number, since it uses as much as digits as its factorization.

254720380457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1881600, while the sum is 47.

The spelling of 254720380457 in words is "two hundred fifty-four billion, seven hundred twenty million, three hundred eighty thousand, four hundred fifty-seven".