6533491905 has 24 divisors (see below), whose sum is σ = 11920758720. Its totient is φ = 3301132320.

The previous prime is 6533491883. The next prime is 6533491907. The reversal of 6533491905 is 5091943356.

It is not a de Polignac number, because 6533491905 - 2⁸ = 6533491649 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (6533491907) 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, 3819901 + ... + 3821610.

It is an arithmetic number, because the mean of its divisors is an integer number (496698280).

Almost surely, 2^6533491905 is an apocalyptic number.

It is an amenable number.

6533491905 is a deficient number, since it is larger than the sum of its proper divisors (5387266815).

6533491905 is a wasteful number, since it uses less digits than its factorization.

6533491905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7641541 (or 7641538 counting only the distinct ones).

The product of its (nonzero) digits is 437400, while the sum is 45.

The square root of 6533491905 is about 80830.0185883933. The cubic root of 6533491905 is about 1869.4554454492.

The spelling of 6533491905 in words is "six billion, five hundred thirty-three million, four hundred ninety-one thousand, nine hundred five".