6553521911 has 4 divisors (see below), whose sum is σ = 6556453752. Its totient is φ = 6550590072.

The previous prime is 6553521907. The next prime is 6553521967. The reversal of 6553521911 is 1191253556.

It is a happy number.

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 6553521911 - 2² = 6553521907 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6553521901) 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, 1462565 + ... + 1467038.

It is an arithmetic number, because the mean of its divisors is an integer number (1639113438).

Almost surely, 2^6553521911 is an apocalyptic number.

6553521911 is a deficient number, since it is larger than the sum of its proper divisors (2931841).

6553521911 is a wasteful number, since it uses less digits than its factorization.

6553521911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2931840.

The product of its digits is 40500, while the sum is 38.

The square root of 6553521911 is about 80953.8257959437. The cubic root of 6553521911 is about 1871.3639196916.

The spelling of 6553521911 in words is "six billion, five hundred fifty-three million, five hundred twenty-one thousand, nine hundred eleven".