7782142864 has 10 divisors (see below), whose sum is σ = 15077901830. Its totient is φ = 3891071424.

The previous prime is 7782142859. The next prime is 7782142889. The reversal of 7782142864 is 4682412877.

It can be written as a sum of positive squares in only one way, i.e., 5827795600 + 1954347264 = 76340^2 + 44208^2 .

It is a super-2 number, since 2×7782142864² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 243191949 + ... + 243191980.

It is an arithmetic number, because the mean of its divisors is an integer number (1507790183).

Almost surely, 2^7782142864 is an apocalyptic number.

It is an amenable number.

7782142864 is a deficient number, since it is larger than the sum of its proper divisors (7295758966).

7782142864 is a wasteful number, since it uses less digits than its factorization.

7782142864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486383937 (or 486383931 counting only the distinct ones).

The product of its digits is 1204224, while the sum is 49.

The square root of 7782142864 is about 88216.4546102370. The cubic root of 7782142864 is about 1981.6779015810.

The spelling of 7782142864 in words is "seven billion, seven hundred eighty-two million, one hundred forty-two thousand, eight hundred sixty-four".