68243707951 has 6 divisors (see below), whose sum is σ = 71339831360. Its totient is φ = 65276589708.

The previous prime is 68243707949. The next prime is 68243707969. The reversal of 68243707951 is 15970734286.

It is not a de Polignac number, because 68243707951 - 2¹ = 68243707949 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 (68243707981) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 64502031 + ... + 64503088.

It is a 2-persistent number, because it is pandigital, and so is 2⋅68243707951 = 136487415902, but 3⋅68243707951 = 204731123853 is not.

Almost surely, 2^68243707951 is an apocalyptic number.

68243707951 is the 165220-th centered pentagonal number.

68243707951 is a deficient number, since it is larger than the sum of its proper divisors (3096123409).

68243707951 is a wasteful number, since it uses less digits than its factorization.

68243707951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129005165 (or 129005142 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 52.

The spelling of 68243707951 in words is "sixty-eight billion, two hundred forty-three million, seven hundred seven thousand, nine hundred fifty-one".