68020715520 has 840 divisors, whose sum is σ = 263020446864. Its totient is φ = 16817061888.

The previous prime is 68020715473. The next prime is 68020715551. The reversal of 68020715520 is 2551702086.

It is a happy number.

68020715520 is a `hidden beast` number, since 6 + 80 + 20 + 7 + 1 + 552 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 1015234527 + ... + 1015234593.

Almost surely, 2^68020715520 is an apocalyptic number.

68020715520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68020715520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131510223432).

68020715520 is an abundant number, since it is smaller than the sum of its proper divisors (194999731344).

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

68020715520 is an frugal number, since it uses more digits than its factorization.

68020715520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135 (or 94 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The spelling of 68020715520 in words is "sixty-eight billion, twenty million, seven hundred fifteen thousand, five hundred twenty".