68869557064 has 128 divisors (see below), whose sum is σ = 168307476480. Its totient is φ = 25617715200.

The previous prime is 68869557061. The next prime is 68869557083. The reversal of 68869557064 is 46075596886.

It is a junction number, because it is equal to n+sod(n) for n = 68869556987 and 68869557005.

It is not an unprimeable number, because it can be changed into a prime (68869557061) 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, 8085672 + ... + 8094184.

It is an arithmetic number, because the mean of its divisors is an integer number (1314902160).

Almost surely, 2^68869557064 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 68869557064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84153738240).

68869557064 is an abundant number, since it is smaller than the sum of its proper divisors (99437919416).

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

68869557064 is a wasteful number, since it uses less digits than its factorization.

68869557064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9131 (or 9127 counting only the distinct ones).

The product of its (nonzero) digits is 87091200, while the sum is 64.

The spelling of 68869557064 in words is "sixty-eight billion, eight hundred sixty-nine million, five hundred fifty-seven thousand, sixty-four".