1620564004343 has 4 divisors (see below), whose sum is σ = 1625234217960. Its totient is φ = 1615893790728.

The previous prime is 1620564004337. The next prime is 1620564004363. The reversal of 1620564004343 is 3434004650261.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1620564004343 - 2¹² = 1620564000247 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1620564004297 and 1620564004306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620564004363) 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, 2335106288 + ... + 2335106981.

It is an arithmetic number, because the mean of its divisors is an integer number (406308554490).

Almost surely, 2^{1620564004343} is an apocalyptic number.

1620564004343 is a deficient number, since it is larger than the sum of its proper divisors (4670213617).

1620564004343 is an equidigital number, since it uses as much as digits as its factorization.

1620564004343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4670213616.

The product of its (nonzero) digits is 207360, while the sum is 38.

The spelling of 1620564004343 in words is "one trillion, six hundred twenty billion, five hundred sixty-four million, four thousand, three hundred forty-three".