6311495690921 has 16 divisors (see below), whose sum is σ = 6926628142080. Its totient is φ = 5732105396160.

The previous prime is 6311495690911. The next prime is 6311495690947. The reversal of 6311495690921 is 1290965941136.

It is a cyclic number.

It is not a de Polignac number, because 6311495690921 - 2¹⁴ = 6311495674537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6311495690911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83471906 + ... + 83547483.

It is an arithmetic number, because the mean of its divisors is an integer number (432914258880).

Almost surely, 2^{6311495690921} is an apocalyptic number.

It is an amenable number.

6311495690921 is a deficient number, since it is larger than the sum of its proper divisors (615132451159).

6311495690921 is a wasteful number, since it uses less digits than its factorization.

6311495690921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167019496.

The product of its (nonzero) digits is 3149280, while the sum is 56.

The spelling of 6311495690921 in words is "six trillion, three hundred eleven billion, four hundred ninety-five million, six hundred ninety thousand, nine hundred twenty-one".