6631211465 has 16 divisors (see below), whose sum is σ = 8181686016. Its totient is φ = 5156438400.

The previous prime is 6631211429. The next prime is 6631211467. The reversal of 6631211465 is 5641121366.

It is not a de Polignac number, because 6631211465 - 2¹² = 6631207369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6631211467) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4127 + ... + 115236.

It is an arithmetic number, because the mean of its divisors is an integer number (511355376).

Almost surely, 2^6631211465 is an apocalyptic number.

It is an amenable number.

6631211465 is a deficient number, since it is larger than the sum of its proper divisors (1550474551).

6631211465 is a wasteful number, since it uses less digits than its factorization.

6631211465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119680.

The product of its digits is 25920, while the sum is 35.

The square root of 6631211465 is about 81432.2507671254. The cubic root of 6631211465 is about 1878.7296632591.

Subtracting from 6631211465 its reverse (5641121366), we obtain a palindrome (990090099).

It can be divided in two parts, 66312 and 11465, that added together give a palindrome (77777).

The spelling of 6631211465 in words is "six billion, six hundred thirty-one million, two hundred eleven thousand, four hundred sixty-five".