68906245520 has 320 divisors, whose sum is σ = 202915155456. Its totient is φ = 21220392960.

The previous prime is 68906245489. The next prime is 68906245523. The reversal of 68906245520 is 2554260986.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (68906245523) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 18666875 + ... + 18670565.

Almost surely, 2^68906245520 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 68906245520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101457577728).

68906245520 is an abundant number, since it is smaller than the sum of its proper divisors (134008909936).

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

68906245520 is a wasteful number, since it uses less digits than its factorization.

68906245520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3818 (or 3812 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 47.

The spelling of 68906245520 in words is "sixty-eight billion, nine hundred six million, two hundred forty-five thousand, five hundred twenty".