249291451168493 has 2 divisors, whose sum is σ = 249291451168494. Its totient is φ = 249291451168492.

The previous prime is 249291451168483. The next prime is 249291451168537. The reversal of 249291451168493 is 394861154192942.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 245050314570889 + 4241136597604 = 15654083^2 + 2059402^2 .

It is a cyclic number.

It is not a de Polignac number, because 249291451168493 - 2⁴ = 249291451168477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249291451168433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124645725584246 + 124645725584247.

It is an arithmetic number, because the mean of its divisors is an integer number (124645725584247).

Almost surely, 2^{249291451168493} is an apocalyptic number.

It is an amenable number.

249291451168493 is a deficient number, since it is larger than the sum of its proper divisors (1).

249291451168493 is an equidigital number, since it uses as much as digits as its factorization.

249291451168493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 134369280, while the sum is 68.

The spelling of 249291451168493 in words is "two hundred forty-nine trillion, two hundred ninety-one billion, four hundred fifty-one million, one hundred sixty-eight thousand, four hundred ninety-three".