68719476730 has 8 divisors (see below), whose sum is σ = 123695058132. Its totient is φ = 27487790688.

The previous prime is 68719476719. The next prime is 68719476731. The reversal of 68719476730 is 3767491786.

It can be written as a sum of positive squares in 2 ways, for example, as 68616230809 + 103245921 = 261947^2 + 10161^2 .

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

It is a super-2 number, since 2×68719476730² (a number of 22 digits) contains 22 as substring.

It is a nialpdrome in base 4, base 8 and base 16.

It is a zygodrome in base 4.

It is not an unprimeable number, because it can be changed into a prime (68719476731) 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, 3435973827 + ... + 3435973846.

Almost surely, 2^68719476730 is an apocalyptic number.

68719476730 is a deficient number, since it is larger than the sum of its proper divisors (54975581402).

68719476730 is a wasteful number, since it uses less digits than its factorization.

68719476730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6871947680.

The product of its (nonzero) digits is 10668672, while the sum is 58.

The spelling of 68719476730 in words is "sixty-eight billion, seven hundred nineteen million, four hundred seventy-six thousand, seven hundred thirty".