68247889021 has 16 divisors (see below), whose sum is σ = 77732751040. Its totient is φ = 59399464320.

The previous prime is 68247889013. The next prime is 68247889027. The reversal of 68247889021 is 12098874286.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 68247889021 - 2³ = 68247889013 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 (68247889027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 602640 + ... + 706873.

It is an arithmetic number, because the mean of its divisors is an integer number (4858296940).

Almost surely, 2^68247889021 is an apocalyptic number.

It is an amenable number.

68247889021 is a deficient number, since it is larger than the sum of its proper divisors (9484862019).

68247889021 is a wasteful number, since it uses less digits than its factorization.

68247889021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1309756.

The product of its (nonzero) digits is 3096576, while the sum is 55.

The spelling of 68247889021 in words is "sixty-eight billion, two hundred forty-seven million, eight hundred eighty-nine thousand, twenty-one".