68561520412 has 96 divisors (see below), whose sum is σ = 152376215040. Its totient is φ = 26216037120.

The previous prime is 68561520403. The next prime is 68561520449. The reversal of 68561520412 is 21402516586.

It is a congruent number.

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, 12299658 + ... + 12305230.

It is an arithmetic number, because the mean of its divisors is an integer number (1587252240).

Almost surely, 2^68561520412 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 68561520412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76188107520).

68561520412 is an abundant number, since it is smaller than the sum of its proper divisors (83814694628).

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

68561520412 is a wasteful number, since it uses less digits than its factorization.

68561520412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6331 (or 6329 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 40.

The spelling of 68561520412 in words is "sixty-eight billion, five hundred sixty-one million, five hundred twenty thousand, four hundred twelve".