68991855327 has 24 divisors (see below), whose sum is σ = 108576198800. Its totient is φ = 43289002368.

The previous prime is 68991855323. The next prime is 68991855347. The reversal of 68991855327 is 72355819986.

68991855327 is a `hidden beast` number, since 6 + 8 + 9 + 91 + 8 + 5 + 532 + 7 = 666.

It is not a de Polignac number, because 68991855327 - 2² = 68991855323 is a prime.

It is a super-2 number, since 2×68991855327² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68991855323) 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, 4413052 + ... + 4428657.

Almost surely, 2^68991855327 is an apocalyptic number.

68991855327 is a deficient number, since it is larger than the sum of its proper divisors (39584343473).

68991855327 is a wasteful number, since it uses less digits than its factorization.

68991855327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8841752 (or 8841729 counting only the distinct ones).

The product of its digits is 32659200, while the sum is 63.

The spelling of 68991855327 in words is "sixty-eight billion, nine hundred ninety-one million, eight hundred fifty-five thousand, three hundred twenty-seven".