68721519408 has 40 divisors (see below), whose sum is σ = 177977821488. Its totient is φ = 22849466112.

The previous prime is 68721519371. The next prime is 68721519409. The reversal of 68721519408 is 80491512786.

It is not an unprimeable number, because it can be changed into a prime (68721519409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1784091 + ... + 1822202.

Almost surely, 2^68721519408 is an apocalyptic number.

It is an amenable number.

68721519408 is an abundant number, since it is smaller than the sum of its proper divisors (109256302080).

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

68721519408 is a wasteful number, since it uses less digits than its factorization.

68721519408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3606701 (or 3606695 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 51.

The spelling of 68721519408 in words is "sixty-eight billion, seven hundred twenty-one million, five hundred nineteen thousand, four hundred eight".