6533378961 has 8 divisors (see below), whose sum is σ = 8896516224. Its totient is φ = 4262913840.

The previous prime is 6533378939. The next prime is 6533378977. The reversal of 6533378961 is 1698733356.

It is a happy number.

6533378961 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6533378961 - 2¹³ = 6533370769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6533378981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23167870 + ... + 23168151.

It is an arithmetic number, because the mean of its divisors is an integer number (1112064528).

Almost surely, 2^6533378961 is an apocalyptic number.

It is an amenable number.

6533378961 is a deficient number, since it is larger than the sum of its proper divisors (2363137263).

6533378961 is a wasteful number, since it uses less digits than its factorization.

6533378961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46336071.

The product of its digits is 2449440, while the sum is 51.

The square root of 6533378961 is about 80829.3199340437. The cubic root of 6533378961 is about 1869.4446730070. Note that the first 3 decimals are identical.

The spelling of 6533378961 in words is "six billion, five hundred thirty-three million, three hundred seventy-eight thousand, nine hundred sixty-one".