254315650549 has 2 divisors, whose sum is σ = 254315650550. Its totient is φ = 254315650548.

The previous prime is 254315650543. The next prime is 254315650559. The reversal of 254315650549 is 945056513452.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 229937512324 + 24378138225 = 479518^2 + 156135^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-254315650549 is a prime.

It is a super-2 number, since 2×254315650549² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (254315650543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127157825274 + 127157825275.

It is an arithmetic number, because the mean of its divisors is an integer number (127157825275).

Almost surely, 2^254315650549 is an apocalyptic number.

It is an amenable number.

254315650549 is a deficient number, since it is larger than the sum of its proper divisors (1).

254315650549 is an equidigital number, since it uses as much as digits as its factorization.

254315650549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240000, while the sum is 49.

The spelling of 254315650549 in words is "two hundred fifty-four billion, three hundred fifteen million, six hundred fifty thousand, five hundred forty-nine".