7621647461 has 2 divisors, whose sum is σ = 7621647462. Its totient is φ = 7621647460.

The previous prime is 7621647401. The next prime is 7621647463. The reversal of 7621647461 is 1647461267.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6803115361 + 818532100 = 82481^2 + 28610^2 .

It is a cyclic number.

It is not a de Polignac number, because 7621647461 - 2¹⁰ = 7621646437 is a prime.

Together with 7621647463, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7621647463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3810823730 + 3810823731.

It is an arithmetic number, because the mean of its divisors is an integer number (3810823731).

Almost surely, 2^7621647461 is an apocalyptic number.

It is an amenable number.

7621647461 is a deficient number, since it is larger than the sum of its proper divisors (1).

7621647461 is an equidigital number, since it uses as much as digits as its factorization.

7621647461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 338688, while the sum is 44.

The square root of 7621647461 is about 87302.0472898545. The cubic root of 7621647461 is about 1967.9600845570.

The spelling of 7621647461 in words is "seven billion, six hundred twenty-one million, six hundred forty-seven thousand, four hundred sixty-one".