68436718400 has 42 divisors (see below), whose sum is σ = 168397104150. Its totient is φ = 27374686720.

The previous prime is 68436718397. The next prime is 68436718409. The reversal of 68436718400 is 481763486.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 561879616 + 67874838784 = 23704^2 + 260528^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68436718409) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21384875 + ... + 21388074.

Almost surely, 2^68436718400 is an apocalyptic number.

It is an amenable number.

68436718400 is an abundant number, since it is smaller than the sum of its proper divisors (99960385750).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68436718400 is a wasteful number, since it uses less digits than its factorization.

68436718400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42772971 (or 42772956 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 47.

The spelling of 68436718400 in words is "sixty-eight billion, four hundred thirty-six million, seven hundred eighteen thousand, four hundred".