68028637329 has 27 divisors (see below), whose sum is σ = 98956744393. Its totient is φ = 45034742472.

The previous prime is 68028637283. The next prime is 68028637373. The reversal of 68028637329 is 92373682086.

It is a happy number.

The square root of 68028637329 is 260823.

It is a perfect power (a square), and thus also a powerful number.

68028637329 is a `hidden beast` number, since 6 + 8 + 0 + 286 + 37 + 329 = 666.

68028637329 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 68028637329 - 2¹⁷ = 68028506257 is a prime.

It is a super-2 number, since 2×68028637329² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68028637379) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 177620272 + ... + 177620654.

Almost surely, 2^68028637329 is an apocalyptic number.

68028637329 is the 260823-rd square number.

68028637329 is the 130412-nd centered octagonal number.

It is an amenable number.

68028637329 is a deficient number, since it is larger than the sum of its proper divisors (30928107064).

68028637329 is an frugal number, since it uses more digits than its factorization.

68028637329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1226 (or 613 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 54.

The spelling of 68028637329 in words is "sixty-eight billion, twenty-eight million, six hundred thirty-seven thousand, three hundred twenty-nine".