6535406563 has 16 divisors (see below), whose sum is σ = 7732255680. Its totient is φ = 5404646016.

The previous prime is 6535406513. The next prime is 6535406623. The reversal of 6535406563 is 3656045356.

It is not a de Polignac number, because 6535406563 - 2⁹ = 6535406051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6535406503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 283881 + ... + 306037.

It is an arithmetic number, because the mean of its divisors is an integer number (483265980).

Almost surely, 2^6535406563 is an apocalyptic number.

6535406563 is a deficient number, since it is larger than the sum of its proper divisors (1196849117).

6535406563 is a wasteful number, since it uses less digits than its factorization.

6535406563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23646.

The product of its (nonzero) digits is 972000, while the sum is 43.

The square root of 6535406563 is about 80841.8614518493. The cubic root of 6535406563 is about 1869.6380439884.

The spelling of 6535406563 in words is "six billion, five hundred thirty-five million, four hundred six thousand, five hundred sixty-three".