67454314640 has 20 divisors (see below), whose sum is σ = 156831281724. Its totient is φ = 26981725824.

The previous prime is 67454314633. The next prime is 67454314661. The reversal of 67454314640 is 4641345476.

It can be written as a sum of positive squares in 2 ways, for example, as 42021720064 + 25432594576 = 204992^2 + 159476^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 67454314591 and 67454314600.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 421589387 + ... + 421589546.

Almost surely, 2^67454314640 is an apocalyptic number.

It is an amenable number.

67454314640 is an abundant number, since it is smaller than the sum of its proper divisors (89376967084).

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

67454314640 is a wasteful number, since it uses less digits than its factorization.

67454314640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 843178946 (or 843178940 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 44.

The spelling of 67454314640 in words is "sixty-seven billion, four hundred fifty-four million, three hundred fourteen thousand, six hundred forty".