7810513481 has 2 divisors, whose sum is σ = 7810513482. Its totient is φ = 7810513480.

The previous prime is 7810513441. The next prime is 7810513553. The reversal of 7810513481 is 1843150187.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7796890000 + 13623481 = 88300^2 + 3691^2 .

It is a cyclic number.

It is not a de Polignac number, because 7810513481 - 2²² = 7806319177 is a prime.

It is a super-2 number, since 2×7810513481² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7810513441) 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 as a sum of consecutive naturals, namely, 3905256740 + 3905256741.

It is an arithmetic number, because the mean of its divisors is an integer number (3905256741).

Almost surely, 2^7810513481 is an apocalyptic number.

It is an amenable number.

7810513481 is a deficient number, since it is larger than the sum of its proper divisors (1).

7810513481 is an equidigital number, since it uses as much as digits as its factorization.

7810513481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26880, while the sum is 38.

The square root of 7810513481 is about 88377.1094854318. The cubic root of 7810513481 is about 1984.0831192448.

The spelling of 7810513481 in words is "seven billion, eight hundred ten million, five hundred thirteen thousand, four hundred eighty-one".