1620644560366 has 16 divisors (see below), whose sum is σ = 2702414752128. Its totient is φ = 723861093600.

The previous prime is 1620644560363. The next prime is 1620644560369. The reversal of 1620644560366 is 6630654460261.

It is an interprime number because it is at equal distance from previous prime (1620644560363) and next prime (1620644560369).

It is a super-3 number, since 3×1620644560366³ (a number of 38 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620644560363) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1005361825 + ... + 1005363436.

It is an arithmetic number, because the mean of its divisors is an integer number (168900922008).

Almost surely, 2^{1620644560366} is an apocalyptic number.

1620644560366 is a deficient number, since it is larger than the sum of its proper divisors (1081770191762).

1620644560366 is a wasteful number, since it uses less digits than its factorization.

1620644560366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2010725307.

The product of its (nonzero) digits is 3732480, while the sum is 49.

The spelling of 1620644560366 in words is "one trillion, six hundred twenty billion, six hundred forty-four million, five hundred sixty thousand, three hundred sixty-six".