7920549761 has 2 divisors, whose sum is σ = 7920549762. Its totient is φ = 7920549760.

The previous prime is 7920549727. The next prime is 7920549827. The reversal of 7920549761 is 1679450297.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6050506225 + 1870043536 = 77785^2 + 43244^2 .

It is a cyclic number.

It is not a de Polignac number, because 7920549761 - 2¹⁰ = 7920548737 is a prime.

It is not a weakly prime, because it can be changed into another prime (7920549701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3960274880 + 3960274881.

It is an arithmetic number, because the mean of its divisors is an integer number (3960274881).

Almost surely, 2^7920549761 is an apocalyptic number.

It is an amenable number.

7920549761 is a deficient number, since it is larger than the sum of its proper divisors (1).

7920549761 is an equidigital number, since it uses as much as digits as its factorization.

7920549761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 952560, while the sum is 50.

The square root of 7920549761 is about 88997.4705314707. The cubic root of 7920549761 is about 1993.3571071655.

The spelling of 7920549761 in words is "seven billion, nine hundred twenty million, five hundred forty-nine thousand, seven hundred sixty-one".