7751380221061 has 2 divisors, whose sum is σ = 7751380221062. Its totient is φ = 7751380221060.

The previous prime is 7751380221041. The next prime is 7751380221097. The reversal of 7751380221061 is 1601220831577.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7411292972161 + 340087248900 = 2722369^2 + 583170^2 .

It is a cyclic number.

It is not a de Polignac number, because 7751380221061 - 2¹⁷ = 7751380089989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7751380220999 and 7751380221017.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7751380221001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3875690110530 + 3875690110531.

It is an arithmetic number, because the mean of its divisors is an integer number (3875690110531).

Almost surely, 2^{7751380221061} is an apocalyptic number.

It is an amenable number.

7751380221061 is a deficient number, since it is larger than the sum of its proper divisors (1).

7751380221061 is an equidigital number, since it uses as much as digits as its factorization.

7751380221061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 141120, while the sum is 43.

The spelling of 7751380221061 in words is "seven trillion, seven hundred fifty-one billion, three hundred eighty million, two hundred twenty-one thousand, sixty-one".