68985980650 has 24 divisors (see below), whose sum is σ = 128322444204. Its totient is φ = 27592560000.

The previous prime is 68985980647. The next prime is 68985980677. The reversal of 68985980650 is 5608958986.

It can be written as a sum of positive squares in 6 ways, for example, as 22571156169 + 46414824481 = 150237^2 + 215441^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 913744 + ... + 986356.

Almost surely, 2^68985980650 is an apocalyptic number.

68985980650 is a deficient number, since it is larger than the sum of its proper divisors (59336463554).

68985980650 is a wasteful number, since it uses less digits than its factorization.

68985980650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91626 (or 91621 counting only the distinct ones).

The product of its (nonzero) digits is 37324800, while the sum is 64.

The spelling of 68985980650 in words is "sixty-eight billion, nine hundred eighty-five million, nine hundred eighty thousand, six hundred fifty".