68423803520 has 32 divisors (see below), whose sum is σ = 163575656820. Its totient is φ = 27369521152.

The previous prime is 68423803451. The next prime is 68423803571. The reversal of 68423803520 is 2530832486.

It can be written as a sum of positive squares in 2 ways, for example, as 64642045504 + 3781758016 = 254248^2 + 61496^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53455457 + ... + 53456736.

Almost surely, 2^68423803520 is an apocalyptic number.

It is an amenable number.

68423803520 is an abundant number, since it is smaller than the sum of its proper divisors (95151853300).

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

68423803520 is a wasteful number, since it uses less digits than its factorization.

68423803520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106912212 (or 106912200 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 41.

The spelling of 68423803520 in words is "sixty-eight billion, four hundred twenty-three million, eight hundred three thousand, five hundred twenty".