68645471254 has 4 divisors (see below), whose sum is σ = 102968206884. Its totient is φ = 34322735626.

The previous prime is 68645471197. The next prime is 68645471269. The reversal of 68645471254 is 45217454686.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17161367812 + ... + 17161367815.

It is an arithmetic number, because the mean of its divisors is an integer number (25742051721).

Almost surely, 2^68645471254 is an apocalyptic number.

68645471254 is a deficient number, since it is larger than the sum of its proper divisors (34322735630).

68645471254 is a wasteful number, since it uses less digits than its factorization.

68645471254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34322735629.

The product of its digits is 6451200, while the sum is 52.

The spelling of 68645471254 in words is "sixty-eight billion, six hundred forty-five million, four hundred seventy-one thousand, two hundred fifty-four".