68642271 has 12 divisors (see below), whose sum is σ = 99347040. Its totient is φ = 45670560.

The previous prime is 68642267. The next prime is 68642279. The reversal of 68642271 is 17224686.

68642271 is a `hidden beast` number, since 6 + 8 + 642 + 2 + 7 + 1 = 666.

It is not a de Polignac number, because 68642271 - 2² = 68642267 is a prime.

It is a super-2 number, since 2×68642271² = 9423522736074882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68642279) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2631 + ... + 12008.

It is an arithmetic number, because the mean of its divisors is an integer number (8278920).

Almost surely, 2^68642271 is an apocalyptic number.

68642271 is a deficient number, since it is larger than the sum of its proper divisors (30704769).

68642271 is a wasteful number, since it uses less digits than its factorization.

68642271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15166 (or 15163 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 68642271 is about 8285.0631258911. The cubic root of 68642271 is about 409.4465485029.

The spelling of 68642271 in words is "sixty-eight million, six hundred forty-two thousand, two hundred seventy-one".