68204238645 has 16 divisors (see below), whose sum is σ = 110441564352. Its totient is φ = 35937333120.

The previous prime is 68204238643. The next prime is 68204238667. The reversal of 68204238645 is 54683240286.

It is not a de Polignac number, because 68204238645 - 2¹ = 68204238643 is a prime.

It is a super-2 number, since 2×68204238645² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 68204238594 and 68204238603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68204238643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27390016 + ... + 27392505.

It is an arithmetic number, because the mean of its divisors is an integer number (6902597772).

Almost surely, 2^68204238645 is an apocalyptic number.

It is an amenable number.

68204238645 is a deficient number, since it is larger than the sum of its proper divisors (42237325707).

68204238645 is a wasteful number, since it uses less digits than its factorization.

68204238645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54782612.

The product of its (nonzero) digits is 2211840, while the sum is 48.

The spelling of 68204238645 in words is "sixty-eight billion, two hundred four million, two hundred thirty-eight thousand, six hundred forty-five".