254720380639 has 2 divisors, whose sum is σ = 254720380640. Its totient is φ = 254720380638.

The previous prime is 254720380631. The next prime is 254720380741. The reversal of 254720380639 is 936083027452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 254720380639 - 2³ = 254720380631 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 254720380592 and 254720380601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (254720380631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127360190319 + 127360190320.

It is an arithmetic number, because the mean of its divisors is an integer number (127360190320).

Almost surely, 2^254720380639 is an apocalyptic number.

254720380639 is a deficient number, since it is larger than the sum of its proper divisors (1).

254720380639 is an equidigital number, since it uses as much as digits as its factorization.

254720380639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2177280, while the sum is 49.

The spelling of 254720380639 in words is "two hundred fifty-four billion, seven hundred twenty million, three hundred eighty thousand, six hundred thirty-nine".