68207021474 has 4 divisors (see below), whose sum is σ = 102310532214. Its totient is φ = 34103510736.

The previous prime is 68207021471. The next prime is 68207021489. The reversal of 68207021474 is 47412070286.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 34237951225 + 33969070249 = 185035^2 + 184307^2 .

It is not an unprimeable number, because it can be changed into a prime (68207021471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17051755367 + ... + 17051755370.

Almost surely, 2^68207021474 is an apocalyptic number.

68207021474 is a deficient number, since it is larger than the sum of its proper divisors (34103510740).

68207021474 is a wasteful number, since it uses less digits than its factorization.

68207021474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34103510739.

The product of its (nonzero) digits is 150528, while the sum is 41.

The spelling of 68207021474 in words is "sixty-eight billion, two hundred seven million, twenty-one thousand, four hundred seventy-four".