68639070578 has 16 divisors (see below), whose sum is σ = 116714209920. Its totient is φ = 30012224976.

The previous prime is 68639070571. The next prime is 68639070581. The reversal of 68639070578 is 87507093686.

It is a super-2 number, since 2×68639070578² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (68639070571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69472250 + ... + 69473237.

It is an arithmetic number, because the mean of its divisors is an integer number (7294638120).

Almost surely, 2^68639070578 is an apocalyptic number.

68639070578 is a deficient number, since it is larger than the sum of its proper divisors (48075139342).

68639070578 is a wasteful number, since it uses less digits than its factorization.

68639070578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138945521.

The product of its (nonzero) digits is 15240960, while the sum is 59.

The spelling of 68639070578 in words is "sixty-eight billion, six hundred thirty-nine million, seventy thousand, five hundred seventy-eight".