68311751571 has 48 divisors (see below), whose sum is σ = 117824061600. Its totient is φ = 39002596416.

The previous prime is 68311751561. The next prime is 68311751713. The reversal of 68311751571 is 17515711386.

68311751571 is a `hidden beast` number, since 6 + 8 + 3 + 1 + 1 + 75 + 1 + 571 = 666.

It is not a de Polignac number, because 68311751571 - 2²¹ = 68309654419 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68311751561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1604961 + ... + 1646973.

It is an arithmetic number, because the mean of its divisors is an integer number (2454667950).

Almost surely, 2^68311751571 is an apocalyptic number.

68311751571 is a deficient number, since it is larger than the sum of its proper divisors (49512310029).

68311751571 is a wasteful number, since it uses less digits than its factorization.

68311751571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43265 (or 43252 counting only the distinct ones).

The product of its digits is 176400, while the sum is 45.

The spelling of 68311751571 in words is "sixty-eight billion, three hundred eleven million, seven hundred fifty-one thousand, five hundred seventy-one".