67640644604684 has 48 divisors (see below), whose sum is σ = 123849232792320. Its totient is φ = 32263050980160.

The previous prime is 67640644604683. The next prime is 67640644604711. The reversal of 67640644604684 is 48640644604676.

It is a self number, because there is not a number n which added to its sum of digits gives 67640644604684.

It is not an unprimeable number, because it can be changed into a prime (67640644604683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1465932254 + ... + 1465978394.

It is an arithmetic number, because the mean of its divisors is an integer number (2580192349840).

Almost surely, 2^{67640644604684} is an apocalyptic number.

It is an amenable number.

67640644604684 is a deficient number, since it is larger than the sum of its proper divisors (56208588187636).

67640644604684 is a wasteful number, since it uses less digits than its factorization.

67640644604684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88590 (or 88588 counting only the distinct ones).

The product of its (nonzero) digits is 445906944, while the sum is 65.

The spelling of 67640644604684 in words is "sixty-seven trillion, six hundred forty billion, six hundred forty-four million, six hundred four thousand, six hundred eighty-four".