249499968442601 has 2 divisors, whose sum is σ = 249499968442602. Its totient is φ = 249499968442600.

The previous prime is 249499968442591. The next prime is 249499968442663. The reversal of 249499968442601 is 106244869994942.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 245556264955225 + 3943703487376 = 15670235^2 + 1985876^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249499968442601 is a prime.

It is not a weakly prime, because it can be changed into another prime (249499908442601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124749984221300 + 124749984221301.

It is an arithmetic number, because the mean of its divisors is an integer number (124749984221301).

Almost surely, 2^{249499968442601} is an apocalyptic number.

It is an amenable number.

249499968442601 is a deficient number, since it is larger than the sum of its proper divisors (1).

249499968442601 is an equidigital number, since it uses as much as digits as its factorization.

249499968442601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1934917632, while the sum is 77.

The spelling of 249499968442601 in words is "two hundred forty-nine trillion, four hundred ninety-nine billion, nine hundred sixty-eight million, four hundred forty-two thousand, six hundred one".