7311000001138 has 4 divisors (see below), whose sum is σ = 10966500001710. Its totient is φ = 3655500000568.

The previous prime is 7311000001121. The next prime is 7311000001157. The reversal of 7311000001138 is 8311000001137.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 7293040516969 + 17959484169 = 2700563^2 + 134013^2 .

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 as a sum of consecutive naturals, namely, 1827750000283 + ... + 1827750000286.

Almost surely, 2^{7311000001138} is an apocalyptic number.

7311000001138 is a deficient number, since it is larger than the sum of its proper divisors (3655500000572).

7311000001138 is a wasteful number, since it uses less digits than its factorization.

7311000001138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3655500000571.

The product of its (nonzero) digits is 504, while the sum is 25.

Subtracting 7311000001138 from its reverse (8311000001137), we obtain a palindrome (999999999999).

The spelling of 7311000001138 in words is "seven trillion, three hundred eleven billion, one thousand, one hundred thirty-eight".