68144404 has 6 divisors (see below), whose sum is σ = 119252714. Its totient is φ = 34072200.

The previous prime is 68144389. The next prime is 68144441. The reversal of 68144404 is 40444186.

It can be written as a sum of positive squares in only one way, i.e., 52128400 + 16016004 = 7220^2 + 4002^2 .

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, 8518047 + ... + 8518054.

Almost surely, 2^68144404 is an apocalyptic number.

It is an amenable number.

68144404 is a deficient number, since it is larger than the sum of its proper divisors (51108310).

68144404 is a wasteful number, since it uses less digits than its factorization.

68144404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17036105 (or 17036103 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 31.

The square root of 68144404 is about 8254.9623863468. The cubic root of 68144404 is about 408.4542310718.

The spelling of 68144404 in words is "sixty-eight million, one hundred forty-four thousand, four hundred four".