4638668722 has 16 divisors (see below), whose sum is σ = 7409892312. Its totient is φ = 2170282240.

The previous prime is 4638668717. The next prime is 4638668737. The reversal of 4638668722 is 2278668364.

It can be written as a sum of positive squares in 4 ways, for example, as 4636111921 + 2556801 = 68089^2 + 1599^2 .

It is a super-2 number, since 2×4638668722² = 43034495024922226568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 4638668722.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 388429 + ... + 400192.

Almost surely, 2^4638668722 is an apocalyptic number.

4638668722 is a deficient number, since it is larger than the sum of its proper divisors (2771223590).

4638668722 is a wasteful number, since it uses less digits than its factorization.

4638668722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788813.

The product of its digits is 4644864, while the sum is 52.

The square root of 4638668722 is about 68107.7728456892. The cubic root of 4638668722 is about 1667.7506525830.

The spelling of 4638668722 in words is "four billion, six hundred thirty-eight million, six hundred sixty-eight thousand, seven hundred twenty-two".