67645361905 has 16 divisors (see below), whose sum is σ = 89466862464. Its totient is φ = 48689441280.

The previous prime is 67645361897. The next prime is 67645361921. The reversal of 67645361905 is 50916354676.

It is not a de Polignac number, because 67645361905 - 2³ = 67645361897 is a prime.

It is a super-3 number, since 3×67645361905³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6334437 + ... + 6345106.

It is an arithmetic number, because the mean of its divisors is an integer number (5591678904).

Almost surely, 2^67645361905 is an apocalyptic number.

It is an amenable number.

67645361905 is a deficient number, since it is larger than the sum of its proper divisors (21821500559).

67645361905 is a wasteful number, since it uses less digits than its factorization.

67645361905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12679656.

The product of its (nonzero) digits is 4082400, while the sum is 52.

The spelling of 67645361905 in words is "sixty-seven billion, six hundred forty-five million, three hundred sixty-one thousand, nine hundred five".