68027791555 has 4 divisors (see below), whose sum is σ = 81633349872. Its totient is φ = 54422233240.

The previous prime is 68027791547. The next prime is 68027791567. The reversal of 68027791555 is 55519772086.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 68027791555 - 2³ = 68027791547 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68027791496 and 68027791505.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6802779151 + ... + 6802779160.

It is an arithmetic number, because the mean of its divisors is an integer number (20408337468).

Almost surely, 2^68027791555 is an apocalyptic number.

68027791555 is a deficient number, since it is larger than the sum of its proper divisors (13605558317).

68027791555 is a wasteful number, since it uses less digits than its factorization.

68027791555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13605558316.

The product of its (nonzero) digits is 5292000, while the sum is 55.

The spelling of 68027791555 in words is "sixty-eight billion, twenty-seven million, seven hundred ninety-one thousand, five hundred fifty-five".