68765931520 has 384 divisors, whose sum is σ = 195754890240. Its totient is φ = 22855680000.

The previous prime is 68765931511. The next prime is 68765931523. The reversal of 68765931520 is 2513956786.

It is a super-4 number, since 4×68765931520⁴ (a number of 44 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68765931523) 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, 221112165 + ... + 221112475.

It is an arithmetic number, because the mean of its divisors is an integer number (509778360).

Almost surely, 2^68765931520 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 68765931520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97877445120).

68765931520 is an abundant number, since it is smaller than the sum of its proper divisors (126988958720).

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

68765931520 is a wasteful number, since it uses less digits than its factorization.

68765931520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513 (or 493 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 52.

The spelling of 68765931520 in words is "sixty-eight billion, seven hundred sixty-five million, nine hundred thirty-one thousand, five hundred twenty".