254240167646639 has 2 divisors, whose sum is σ = 254240167646640. Its totient is φ = 254240167646638.

The previous prime is 254240167646593. The next prime is 254240167646657. The reversal of 254240167646639 is 936646761042452.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-254240167646639 is a prime.

It is a super-2 number, since 2×254240167646639² (a number of 30 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (254240167646039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127120083823319 + 127120083823320.

It is an arithmetic number, because the mean of its divisors is an integer number (127120083823320).

Almost surely, 2^{254240167646639} is an apocalyptic number.

254240167646639 is a deficient number, since it is larger than the sum of its proper divisors (1).

254240167646639 is an equidigital number, since it uses as much as digits as its factorization.

254240167646639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 313528320, while the sum is 65.

The spelling of 254240167646639 in words is "two hundred fifty-four trillion, two hundred forty billion, one hundred sixty-seven million, six hundred forty-six thousand, six hundred thirty-nine".