68428669451 has 2 divisors, whose sum is σ = 68428669452. Its totient is φ = 68428669450.

The previous prime is 68428669429. The next prime is 68428669513. The reversal of 68428669451 is 15496682486.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68428669451 is a prime.

It is not a weakly prime, because it can be changed into another prime (68428669951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34214334725 + 34214334726.

It is an arithmetic number, because the mean of its divisors is an integer number (34214334726).

Almost surely, 2^68428669451 is an apocalyptic number.

68428669451 is a deficient number, since it is larger than the sum of its proper divisors (1).

68428669451 is an equidigital number, since it uses as much as digits as its factorization.

68428669451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19906560, while the sum is 59.

The spelling of 68428669451 in words is "sixty-eight billion, four hundred twenty-eight million, six hundred sixty-nine thousand, four hundred fifty-one".