1564640353563 has 24 divisors (see below), whose sum is σ = 2485979107920. Its totient is φ = 872273364480.

The previous prime is 1564640353553. The next prime is 1564640353571. The reversal of 1564640353563 is 3653530464651.

It is not a de Polignac number, because 1564640353563 - 2⁴ = 1564640353547 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1564640353543) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 129796558 + ... + 129808611.

It is an arithmetic number, because the mean of its divisors is an integer number (103582462830).

Almost surely, 2^{1564640353563} is an apocalyptic number.

1564640353563 is a deficient number, since it is larger than the sum of its proper divisors (921338754357).

1564640353563 is a wasteful number, since it uses less digits than its factorization.

1564640353563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259605227 (or 259605220 counting only the distinct ones).

The product of its (nonzero) digits is 11664000, while the sum is 51.

The spelling of 1564640353563 in words is "one trillion, five hundred sixty-four billion, six hundred forty million, three hundred fifty-three thousand, five hundred sixty-three".