7720961162 has 32 divisors (see below), whose sum is σ = 12640164048. Its totient is φ = 3522272256.

The previous prime is 7720961159. The next prime is 7720961167. The reversal of 7720961162 is 2611690277.

It is a Cunningham number, because it is equal to 87869²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 6593277601 + 1127683561 = 81199^2 + 33581^2 .

It is a super-2 number, since 2×7720961162² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7720961167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 337388 + ... + 359544.

Almost surely, 2^7720961162 is an apocalyptic number.

7720961162 is a deficient number, since it is larger than the sum of its proper divisors (4919202886).

7720961162 is a wasteful number, since it uses less digits than its factorization.

7720961162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22490.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 7720961162 is about 87869.0000056903. Note that the first 5 decimals coincide. The cubic root of 7720961162 is about 1976.4710430856.

The spelling of 7720961162 in words is "seven billion, seven hundred twenty million, nine hundred sixty-one thousand, one hundred sixty-two".