6531121077 has 16 divisors (see below), whose sum is σ = 9394029120. Its totient is φ = 4012290432.

The previous prime is 6531121063. The next prime is 6531121109. The reversal of 6531121077 is 7701211356.

It is not a de Polignac number, because 6531121077 - 2¹⁰ = 6531120053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6531121057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119752 + ... + 165537.

It is an arithmetic number, because the mean of its divisors is an integer number (587126820).

Almost surely, 2^6531121077 is an apocalyptic number.

It is an amenable number.

6531121077 is a deficient number, since it is larger than the sum of its proper divisors (2862908043).

6531121077 is a wasteful number, since it uses less digits than its factorization.

6531121077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285892.

The product of its (nonzero) digits is 8820, while the sum is 33.

The square root of 6531121077 is about 80815.3517408667. The cubic root of 6531121077 is about 1869.2292931052.

The spelling of 6531121077 in words is "six billion, five hundred thirty-one million, one hundred twenty-one thousand, seventy-seven".