68643226450 has 48 divisors (see below), whose sum is σ = 135286981704. Its totient is φ = 25823001600.

The previous prime is 68643226427. The next prime is 68643226541. The reversal of 68643226450 is 5462234686.

It can be written as a sum of positive squares in 12 ways, for example, as 16559314489 + 52083911961 = 128683^2 + 228219^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 68643226450.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1144612 + ... + 1203088.

Almost surely, 2^68643226450 is an apocalyptic number.

68643226450 is a deficient number, since it is larger than the sum of its proper divisors (66643755254).

68643226450 is a wasteful number, since it uses less digits than its factorization.

68643226450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59887 (or 59882 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 46.

The spelling of 68643226450 in words is "sixty-eight billion, six hundred forty-three million, two hundred twenty-six thousand, four hundred fifty".