7940511005 has 18 divisors (see below), whose sum is σ = 11086252506. Its totient is φ = 5443965408.

The previous prime is 7940511001. The next prime is 7940511023. The reversal of 7940511005 is 5001150497.

It can be written as a sum of positive squares in 3 ways, for example, as 88247236 + 7852263769 = 9394^2 + 88613^2 .

It is not a de Polignac number, because 7940511005 - 2² = 7940511001 is a prime.

It is a super-2 number, since 2×7940511005² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7940511001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1391939 + ... + 1397631.

It is an arithmetic number, because the mean of its divisors is an integer number (615902917).

Almost surely, 2^7940511005 is an apocalyptic number.

It is an amenable number.

7940511005 is a deficient number, since it is larger than the sum of its proper divisors (3145741501).

7940511005 is an frugal number, since it uses more digits than its factorization.

7940511005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11405 (or 5705 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 32.

The square root of 7940511005 is about 89109.5449713441. The cubic root of 7940511005 is about 1995.0302447451.

The spelling of 7940511005 in words is "seven billion, nine hundred forty million, five hundred eleven thousand, five".