68727720936 has 128 divisors (see below), whose sum is σ = 203059445760. Its totient is φ = 18969292800.

The previous prime is 68727720931. The next prime is 68727720937. The reversal of 68727720936 is 63902772786.

It is not an unprimeable number, because it can be changed into a prime (68727720931) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2993581 + ... + 3016451.

It is an arithmetic number, because the mean of its divisors is an integer number (1586401920).

Almost surely, 2^68727720936 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 68727720936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101529722880).

68727720936 is an abundant number, since it is smaller than the sum of its proper divisors (134331724824).

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

68727720936 is a wasteful number, since it uses less digits than its factorization.

68727720936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23495 (or 23491 counting only the distinct ones).

The product of its (nonzero) digits is 10668672, while the sum is 57.

The spelling of 68727720936 in words is "sixty-eight billion, seven hundred twenty-seven million, seven hundred twenty thousand, nine hundred thirty-six".