68490885871 has 8 divisors (see below), whose sum is σ = 69273719424. Its totient is φ = 67710319320.

The previous prime is 68490885847. The next prime is 68490885887. The reversal of 68490885871 is 17858809486.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68490885871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68490885811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 505945 + ... + 626866.

It is an arithmetic number, because the mean of its divisors is an integer number (8659214928).

Almost surely, 2^68490885871 is an apocalyptic number.

68490885871 is a deficient number, since it is larger than the sum of its proper divisors (782833553).

68490885871 is a wasteful number, since it uses less digits than its factorization.

68490885871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1133501.

The product of its (nonzero) digits is 30965760, while the sum is 64.

The spelling of 68490885871 in words is "sixty-eight billion, four hundred ninety million, eight hundred eighty-five thousand, eight hundred seventy-one".