68531897459520 has 168 divisors, whose sum is σ = 257150369904480. Its totient is φ = 16613793315840.

The previous prime is 68531897459489. The next prime is 68531897459521. The reversal of 68531897459520 is 2595479813586.

68531897459520 is a `hidden beast` number, since 6 + 8 + 5 + 3 + 1 + 8 + 9 + 7 + 4 + 595 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68531897459521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1081595490 + ... + 1081658849.

It is a 1-persistent number, because it is pandigital, but 2⋅68531897459520 = 137063794919040 is not.

Almost surely, 2^{68531897459520} is an apocalyptic number.

68531897459520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68531897459520 is an abundant number, since it is smaller than the sum of its proper divisors (188618472444960).

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

68531897459520 is a wasteful number, since it uses less digits than its factorization.

68531897459520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2163254373 (or 2163254360 counting only the distinct ones).

The product of its (nonzero) digits is 653184000, while the sum is 72.

The spelling of 68531897459520 in words is "sixty-eight trillion, five hundred thirty-one billion, eight hundred ninety-seven million, four hundred fifty-nine thousand, five hundred twenty".