1620031324560 has 80 divisors (see below), whose sum is σ = 5478651397440. Its totient is φ = 392734865920.

The previous prime is 1620031324559. The next prime is 1620031324601. The reversal of 1620031324560 is 654231300261.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 306821475 + ... + 306826754.

It is an arithmetic number, because the mean of its divisors is an integer number (68483142468).

Almost surely, 2^{1620031324560} is an apocalyptic number.

1620031324560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1620031324560 is an abundant number, since it is smaller than the sum of its proper divisors (3858620072880).

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

1620031324560 is a wasteful number, since it uses less digits than its factorization.

1620031324560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613648256 (or 613648250 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

The spelling of 1620031324560 in words is "one trillion, six hundred twenty billion, thirty-one million, three hundred twenty-four thousand, five hundred sixty".