4021611366544 has 10 divisors (see below), whose sum is σ = 7791872022710. Its totient is φ = 2010805683264.

The previous prime is 4021611366499. The next prime is 4021611366559. The reversal of 4021611366544 is 4456631161204.

It can be written as a sum of positive squares in only one way, i.e., 4016064096144 + 5547270400 = 2004012^2 + 74480^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 4021611366544.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125675355189 + ... + 125675355220.

It is an arithmetic number, because the mean of its divisors is an integer number (779187202271).

Almost surely, 2^{4021611366544} is an apocalyptic number.

It is an amenable number.

4021611366544 is a deficient number, since it is larger than the sum of its proper divisors (3770260656166).

4021611366544 is a wasteful number, since it uses less digits than its factorization.

4021611366544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251350710417 (or 251350710411 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 43.

The spelling of 4021611366544 in words is "four trillion, twenty-one billion, six hundred eleven million, three hundred sixty-six thousand, five hundred forty-four".