68343787658137 has 4 divisors (see below), whose sum is σ = 69363844190416. Its totient is φ = 67323731125860.

The previous prime is 68343787658117. The next prime is 68343787658207. The reversal of 68343787658137 is 73185678734386.

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 a de Polignac number, because none of the positive numbers 2^k-68343787658137 is a prime.

It is a super-2 number, since 2×68343787658137² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68343787658117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 510028266039 + ... + 510028266172.

It is an arithmetic number, because the mean of its divisors is an integer number (17340961047604).

Almost surely, 2^{68343787658137} is an apocalyptic number.

68343787658137 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

It is an amenable number.

68343787658137 is a deficient number, since it is larger than the sum of its proper divisors (1020056532279).

68343787658137 is a wasteful number, since it uses less digits than its factorization.

68343787658137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020056532278.

The product of its digits is 3413975040, while the sum is 76.

The spelling of 68343787658137 in words is "sixty-eight trillion, three hundred forty-three billion, seven hundred eighty-seven million, six hundred fifty-eight thousand, one hundred thirty-seven".