7647838261631 has 2 divisors, whose sum is σ = 7647838261632. Its totient is φ = 7647838261630.

The previous prime is 7647838261573. The next prime is 7647838261649. The reversal of 7647838261631 is 1361628387467.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7647838261631 is a prime.

It is a super-2 number, since 2×7647838261631² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7647838264631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3823919130815 + 3823919130816.

It is an arithmetic number, because the mean of its divisors is an integer number (3823919130816).

Almost surely, 2^{7647838261631} is an apocalyptic number.

7647838261631 is a deficient number, since it is larger than the sum of its proper divisors (1).

7647838261631 is an equidigital number, since it uses as much as digits as its factorization.

7647838261631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48771072, while the sum is 62.

The spelling of 7647838261631 in words is "seven trillion, six hundred forty-seven billion, eight hundred thirty-eight million, two hundred sixty-one thousand, six hundred thirty-one".