1616360216544 has 72 divisors (see below), whose sum is σ = 4611497010120. Its totient is φ = 537031703808.

The previous prime is 1616360216543. The next prime is 1616360216579. The reversal of 1616360216544 is 4456120636161.

1616360216544 is a `hidden beast` number, since 1 + 6 + 1 + 636 + 0 + 2 + 1 + 6 + 5 + 4 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×1616360216544² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1616360216544.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1616360216543) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9052239 + ... + 9229070.

It is an arithmetic number, because the mean of its divisors is an integer number (64048569585).

Almost surely, 2^{1616360216544} is an apocalyptic number.

It is an amenable number.

1616360216544 is an abundant number, since it is smaller than the sum of its proper divisors (2995136793576).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1616360216544 is a wasteful number, since it uses less digits than its factorization.

1616360216544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18281632 (or 18281621 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The spelling of 1616360216544 in words is "one trillion, six hundred sixteen billion, three hundred sixty million, two hundred sixteen thousand, five hundred forty-four".