68209120544 has 48 divisors (see below), whose sum is σ = 136587742200. Its totient is φ = 33520988160.

The previous prime is 68209120493. The next prime is 68209120559. The reversal of 68209120544 is 44502190286.

It can be written as a sum of positive squares in 4 ways, for example, as 58569808144 + 9639312400 = 242012^2 + 98180^2 .

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2824232 + ... + 2848280.

Almost surely, 2^68209120544 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 68209120544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68293871100).

68209120544 is an abundant number, since it is smaller than the sum of its proper divisors (68378621656).

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

68209120544 is a wasteful number, since it uses less digits than its factorization.

68209120544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25573 (or 25565 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 41.

The spelling of 68209120544 in words is "sixty-eight billion, two hundred nine million, one hundred twenty thousand, five hundred forty-four".