68591959920 has 280 divisors, whose sum is σ = 260844345072. Its totient is φ = 16628198400.

The previous prime is 68591959867. The next prime is 68591959949. The reversal of 68591959920 is 2995919586.

68591959920 is a `hidden beast` number, since 6 + 8 + 5 + 9 + 19 + 599 + 20 = 666.

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, 588060 + ... + 694980.

Almost surely, 2^68591959920 is an apocalyptic number.

68591959920 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 68591959920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130422172536).

68591959920 is an abundant number, since it is smaller than the sum of its proper divisors (192252385152).

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

68591959920 is a wasteful number, since it uses less digits than its factorization.

68591959920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106963 (or 106942 counting only the distinct ones).

The product of its (nonzero) digits is 15746400, while the sum is 63.

The spelling of 68591959920 in words is "sixty-eight billion, five hundred ninety-one million, nine hundred fifty-nine thousand, nine hundred twenty".