1620566733764 has 12 divisors (see below), whose sum is σ = 3093809219088. Its totient is φ = 736621242600.

The previous prime is 1620566733733. The next prime is 1620566733767. The reversal of 1620566733764 is 4673376650261.

It is not an unprimeable number, because it can be changed into a prime (1620566733767) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18415531022 + ... + 18415531109.

It is an arithmetic number, because the mean of its divisors is an integer number (257817434924).

Almost surely, 2^{1620566733764} is an apocalyptic number.

It is an amenable number.

1620566733764 is a deficient number, since it is larger than the sum of its proper divisors (1473242485324).

1620566733764 is a wasteful number, since it uses less digits than its factorization.

1620566733764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36831062146 (or 36831062144 counting only the distinct ones).

The product of its (nonzero) digits is 22861440, while the sum is 56.

The spelling of 1620566733764 in words is "one trillion, six hundred twenty billion, five hundred sixty-six million, seven hundred thirty-three thousand, seven hundred sixty-four".