68530667353821 has 24 divisors (see below), whose sum is σ = 99023477267520. Its totient is φ = 45671081040000.

The previous prime is 68530667353651. The next prime is 68530667353829. The reversal of 68530667353821 is 12835376603586.

It is a happy number.

68530667353821 is a `hidden beast` number, since 6 + 8 + 5 + 3 + 0 + 6 + 6 + 73 + 538 + 21 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-68530667353821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68530667353829) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1041324165 + ... + 1041389973.

It is an arithmetic number, because the mean of its divisors is an integer number (4125978219480).

Almost surely, 2^{68530667353821} is an apocalyptic number.

It is an amenable number.

68530667353821 is a deficient number, since it is larger than the sum of its proper divisors (30492809913699).

68530667353821 is a wasteful number, since it uses less digits than its factorization.

68530667353821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104657 (or 104654 counting only the distinct ones).

The product of its (nonzero) digits is 130636800, while the sum is 63.

The spelling of 68530667353821 in words is "sixty-eight trillion, five hundred thirty billion, six hundred sixty-seven million, three hundred fifty-three thousand, eight hundred twenty-one".