68135223936 has 256 divisors, whose sum is σ = 200988144000. Its totient is φ = 20320616448.

The previous prime is 68135223929. The next prime is 68135223973. The reversal of 68135223936 is 63932253186.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21498960 + ... + 21502128.

Almost surely, 2^68135223936 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68135223936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100494072000).

68135223936 is an abundant number, since it is smaller than the sum of its proper divisors (132852920064).

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

68135223936 is a wasteful number, since it uses less digits than its factorization.

68135223936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3331 (or 3319 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 48.

The spelling of 68135223936 in words is "sixty-eight billion, one hundred thirty-five million, two hundred twenty-three thousand, nine hundred thirty-six".