68424472757 has 2 divisors, whose sum is σ = 68424472758. Its totient is φ = 68424472756.

The previous prime is 68424472751. The next prime is 68424472759. The reversal of 68424472757 is 75727442486.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66334062916 + 2090409841 = 257554^2 + 45721^2 .

It is a cyclic number.

It is not a de Polignac number, because 68424472757 - 2⁶ = 68424472693 is a prime.

Together with 68424472759, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68424472751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34212236378 + 34212236379.

It is an arithmetic number, because the mean of its divisors is an integer number (34212236379).

Almost surely, 2^68424472757 is an apocalyptic number.

It is an amenable number.

68424472757 is a deficient number, since it is larger than the sum of its proper divisors (1).

68424472757 is an equidigital number, since it uses as much as digits as its factorization.

68424472757 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21073920, while the sum is 56.

The spelling of 68424472757 in words is "sixty-eight billion, four hundred twenty-four million, four hundred seventy-two thousand, seven hundred fifty-seven".