68404066480 has 20 divisors (see below), whose sum is σ = 159039454752. Its totient is φ = 27361626560.

The previous prime is 68404066447. The next prime is 68404066499. The reversal of 68404066480 is 8466040486.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×68404066480² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 68404066480.

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, 427525336 + ... + 427525495.

Almost surely, 2^68404066480 is an apocalyptic number.

It is an amenable number.

68404066480 is an abundant number, since it is smaller than the sum of its proper divisors (90635388272).

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

68404066480 is a wasteful number, since it uses less digits than its factorization.

68404066480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855050844 (or 855050838 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 46.

The spelling of 68404066480 in words is "sixty-eight billion, four hundred four million, sixty-six thousand, four hundred eighty".