7777643348 has 12 divisors (see below), whose sum is σ = 13689552660. Its totient is φ = 3866342592.

The previous prime is 7777643347. The next prime is 7777643389. The reversal of 7777643348 is 8433467777.

It can be written as a sum of positive squares in 2 ways, for example, as 4364980624 + 3412662724 = 66068^2 + 58418^2 .

It is a junction number, because it is equal to n+sod(n) for n = 7777643293 and 7777643302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7777643347) 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 in 3 ways as a sum of consecutive naturals, for example, 5618993 + ... + 5620376.

It is an arithmetic number, because the mean of its divisors is an integer number (1140796055).

Almost surely, 2^7777643348 is an apocalyptic number.

It is an amenable number.

7777643348 is a deficient number, since it is larger than the sum of its proper divisors (5911909312).

7777643348 is a wasteful number, since it uses less digits than its factorization.

7777643348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11239546 (or 11239544 counting only the distinct ones).

The product of its digits is 16595712, while the sum is 56.

The square root of 7777643348 is about 88190.9482203247. The cubic root of 7777643348 is about 1981.2959026633.

The spelling of 7777643348 in words is "seven billion, seven hundred seventy-seven million, six hundred forty-three thousand, three hundred forty-eight".