7311631234640 has 40 divisors (see below), whose sum is σ = 17894255393760. Its totient is φ = 2770723414656.

The previous prime is 7311631234639. The next prime is 7311631234673. The reversal of 7311631234640 is 464321361137.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×7311631234640² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2405140334 + ... + 2405143373.

It is an arithmetic number, because the mean of its divisors is an integer number (447356384844).

Almost surely, 2^{7311631234640} is an apocalyptic number.

It is an amenable number.

7311631234640 is an abundant number, since it is smaller than the sum of its proper divisors (10582624159120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7311631234640 is a wasteful number, since it uses less digits than its factorization.

7311631234640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4810283739 (or 4810283733 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 41.

Adding to 7311631234640 its reverse (464321361137), we get a palindrome (7775952595777).

The spelling of 7311631234640 in words is "seven trillion, three hundred eleven billion, six hundred thirty-one million, two hundred thirty-four thousand, six hundred forty".