68157431298349 has 4 divisors (see below), whose sum is σ = 68157460866400. Its totient is φ = 68157401730300.

The previous prime is 68157431298293. The next prime is 68157431298373. The reversal of 68157431298349 is 94389213475186.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 68157431298349 - 2¹⁷ = 68157431167277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68157431293349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11004249 + ... + 16043950.

It is an arithmetic number, because the mean of its divisors is an integer number (17039365216600).

Almost surely, 2^{68157431298349} is an apocalyptic number.

It is an amenable number.

68157431298349 is a deficient number, since it is larger than the sum of its proper divisors (29568051).

68157431298349 is a wasteful number, since it uses less digits than its factorization.

68157431298349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29568050.

The product of its digits is 313528320, while the sum is 70.

The spelling of 68157431298349 in words is "sixty-eight trillion, one hundred fifty-seven billion, four hundred thirty-one million, two hundred ninety-eight thousand, three hundred forty-nine".