68824131757 has 2 divisors, whose sum is σ = 68824131758. Its totient is φ = 68824131756.

The previous prime is 68824131751. The next prime is 68824131787. The reversal of 68824131757 is 75713142886.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38994005961 + 29830125796 = 197469^2 + 172714^2 .

It is a cyclic number.

It is not a de Polignac number, because 68824131757 - 2³⁵ = 34464393389 is a prime.

It is a super-2 number, since 2×68824131757² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68824131751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34412065878 + 34412065879.

It is an arithmetic number, because the mean of its divisors is an integer number (34412065879).

Almost surely, 2^68824131757 is an apocalyptic number.

It is an amenable number.

68824131757 is a deficient number, since it is larger than the sum of its proper divisors (1).

68824131757 is an equidigital number, since it uses as much as digits as its factorization.

68824131757 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2257920, while the sum is 52.

The spelling of 68824131757 in words is "sixty-eight billion, eight hundred twenty-four million, one hundred thirty-one thousand, seven hundred fifty-seven".