1623664011604 has 12 divisors (see below), whose sum is σ = 2868998545504. Its totient is φ = 803950141464.

The previous prime is 1623664011589. The next prime is 1623664011617. The reversal of 1623664011604 is 4061104663261.

It is a happy number.

It is a congruent number.

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, 1970465622 + ... + 1970466445.

Almost surely, 2^{1623664011604} is an apocalyptic number.

It is an amenable number.

1623664011604 is a deficient number, since it is larger than the sum of its proper divisors (1245334533900).

1623664011604 is a wasteful number, since it uses less digits than its factorization.

1623664011604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3940932174 (or 3940932172 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 40.

Adding to 1623664011604 its reverse (4061104663261), we get a palindrome (5684768674865).

The spelling of 1623664011604 in words is "one trillion, six hundred twenty-three billion, six hundred sixty-four million, eleven thousand, six hundred four".