7812665956 has 12 divisors (see below), whose sum is σ = 13813116268. Its totient is φ = 3866061312.

The previous prime is 7812665947. The next prime is 7812665957. The reversal of 7812665956 is 6595662187.

It can be written as a sum of positive squares in 2 ways, for example, as 2398060900 + 5414605056 = 48970^2 + 73584^2 .

It is a super-2 number, since 2×7812665956² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7812665897 and 7812665906.

It is not an unprimeable number, because it can be changed into a prime (7812665957) 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 3 ways as a sum of consecutive naturals, for example, 10067481 + ... + 10068256.

Almost surely, 2^7812665956 is an apocalyptic number.

It is an amenable number.

7812665956 is a deficient number, since it is larger than the sum of its proper divisors (6000450312).

7812665956 is a wasteful number, since it uses less digits than its factorization.

7812665956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20135838 (or 20135836 counting only the distinct ones).

The product of its digits is 5443200, while the sum is 55.

The square root of 7812665956 is about 88389.2864322368. The cubic root of 7812665956 is about 1984.2653649263.

The spelling of 7812665956 in words is "seven billion, eight hundred twelve million, six hundred sixty-five thousand, nine hundred fifty-six".