7664512131 has 6 divisors (see below), whose sum is σ = 11070961980. Its totient is φ = 5109674748.

The previous prime is 7664512129. The next prime is 7664512181. The reversal of 7664512131 is 1312154667.

7664512131 is a `hidden beast` number, since 7 + 6 + 6 + 4 + 512 + 131 = 666.

It is not a de Polignac number, because 7664512131 - 2¹ = 7664512129 is a prime.

It is a super-2 number, since 2×7664512131² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7664512181) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 425806221 + ... + 425806238.

It is an arithmetic number, because the mean of its divisors is an integer number (1845160330).

Almost surely, 2^7664512131 is an apocalyptic number.

7664512131 is a deficient number, since it is larger than the sum of its proper divisors (3406449849).

7664512131 is a wasteful number, since it uses less digits than its factorization.

7664512131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851612465 (or 851612462 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 7664512131 is about 87547.1994469269. The cubic root of 7664512131 is about 1971.6425040974.

Adding to 7664512131 its reverse (1312154667), we get a palindrome (8976666798).

The spelling of 7664512131 in words is "seven billion, six hundred sixty-four million, five hundred twelve thousand, one hundred thirty-one".