4642661972 has 12 divisors (see below), whose sum is σ = 8749632276. Its totient is φ = 2142767040.

The previous prime is 4642661929. The next prime is 4642661977. The reversal of 4642661972 is 2791662464.

It can be written as a sum of positive squares in 2 ways, for example, as 261016336 + 4381645636 = 16156^2 + 66194^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4642661977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44640929 + ... + 44641032.

It is an arithmetic number, because the mean of its divisors is an integer number (729136023).

Almost surely, 2^4642661972 is an apocalyptic number.

It is an amenable number.

4642661972 is a deficient number, since it is larger than the sum of its proper divisors (4106970304).

4642661972 is a wasteful number, since it uses less digits than its factorization.

4642661972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89281978 (or 89281976 counting only the distinct ones).

The product of its digits is 870912, while the sum is 47.

The square root of 4642661972 is about 68137.0822093227. The cubic root of 4642661972 is about 1668.2290826073.

The spelling of 4642661972 in words is "four billion, six hundred forty-two million, six hundred sixty-one thousand, nine hundred seventy-two".