4689021561 has 32 divisors (see below), whose sum is σ = 7210469376. Its totient is φ = 2655072000.

The previous prime is 4689021521. The next prime is 4689021563. The reversal of 4689021561 is 1651209864.

It is not a de Polignac number, because 4689021561 - 2¹³ = 4689013369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4689021563) 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 31 ways as a sum of consecutive naturals, for example, 1065676 + ... + 1070066.

It is an arithmetic number, because the mean of its divisors is an integer number (225327168).

Almost surely, 2^4689021561 is an apocalyptic number.

It is an amenable number.

4689021561 is a deficient number, since it is larger than the sum of its proper divisors (2521447815).

4689021561 is a wasteful number, since it uses less digits than its factorization.

4689021561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4853.

The product of its (nonzero) digits is 103680, while the sum is 42.

The square root of 4689021561 is about 68476.4306969924. The cubic root of 4689021561 is about 1673.7634370504.

The spelling of 4689021561 in words is "four billion, six hundred eighty-nine million, twenty-one thousand, five hundred sixty-one".