7651082561 has 2 divisors, whose sum is σ = 7651082562. Its totient is φ = 7651082560.

The previous prime is 7651082539. The next prime is 7651082633. The reversal of 7651082561 is 1652801567.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6065450161 + 1585632400 = 77881^2 + 39820^2 .

It is an emirp because it is prime and its reverse (1652801567) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7651082561 - 2¹⁴ = 7651066177 is a prime.

It is not a weakly prime, because it can be changed into another prime (7651082531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3825541280 + 3825541281.

It is an arithmetic number, because the mean of its divisors is an integer number (3825541281).

Almost surely, 2^7651082561 is an apocalyptic number.

It is an amenable number.

7651082561 is a deficient number, since it is larger than the sum of its proper divisors (1).

7651082561 is an equidigital number, since it uses as much as digits as its factorization.

7651082561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100800, while the sum is 41.

The square root of 7651082561 is about 87470.4667930839. The cubic root of 7651082561 is about 1970.4902763354.

The spelling of 7651082561 in words is "seven billion, six hundred fifty-one million, eighty-two thousand, five hundred sixty-one".