68037451549 has 2 divisors, whose sum is σ = 68037451550. Its totient is φ = 68037451548.

The previous prime is 68037451523. The next prime is 68037451571. The reversal of 68037451549 is 94515473086.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53925199524 + 14112252025 = 232218^2 + 118795^2 .

It is a cyclic number.

It is not a de Polignac number, because 68037451549 - 2³³ = 59447516957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68037451496 and 68037451505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68037451579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34018725774 + 34018725775.

It is an arithmetic number, because the mean of its divisors is an integer number (34018725775).

Almost surely, 2^68037451549 is an apocalyptic number.

It is an amenable number.

68037451549 is a deficient number, since it is larger than the sum of its proper divisors (1).

68037451549 is an equidigital number, since it uses as much as digits as its factorization.

68037451549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3628800, while the sum is 52.

The spelling of 68037451549 in words is "sixty-eight billion, thirty-seven million, four hundred fifty-one thousand, five hundred forty-nine".