68724543722 has 8 divisors (see below), whose sum is σ = 103088107236. Its totient is φ = 34361841312.

The previous prime is 68724543721. The next prime is 68724543761. The reversal of 68724543722 is 22734542786.

It can be written as a sum of positive squares in 2 ways, for example, as 66310885081 + 2413658641 = 257509^2 + 49129^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×68724543722² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68724543721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49268 + ... + 374000.

Almost surely, 2^68724543722 is an apocalyptic number.

68724543722 is a deficient number, since it is larger than the sum of its proper divisors (34363563514).

68724543722 is a wasteful number, since it uses less digits than its factorization.

68724543722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430552.

The product of its digits is 4515840, while the sum is 50.

The spelling of 68724543722 in words is "sixty-eight billion, seven hundred twenty-four million, five hundred forty-three thousand, seven hundred twenty-two".