4005555565646 has 4 divisors (see below), whose sum is σ = 6008333348472. Its totient is φ = 2002777782822.

The previous prime is 4005555565643. The next prime is 4005555565681. The reversal of 4005555565646 is 6465655555004.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 4005555565591 and 4005555565600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4005555565643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1001388891410 + ... + 1001388891413.

It is an arithmetic number, because the mean of its divisors is an integer number (1502083337118).

Almost surely, 2^{4005555565646} is an apocalyptic number.

4005555565646 is a deficient number, since it is larger than the sum of its proper divisors (2002777782826).

4005555565646 is a wasteful number, since it uses less digits than its factorization.

4005555565646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2002777782825.

The product of its (nonzero) digits is 54000000, while the sum is 56.

The spelling of 4005555565646 in words is "four trillion, five billion, five hundred fifty-five million, five hundred sixty-five thousand, six hundred forty-six".