4931002561 has 4 divisors (see below), whose sum is σ = 4931143300. Its totient is φ = 4930861824.

The previous prime is 4931002529. The next prime is 4931002567. The reversal of 4931002561 is 1652001394.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 4768593025 + 162409536 = 69055^2 + 12744^2 .

It is a cyclic number.

It is not a de Polignac number, because 4931002561 - 2⁵ = 4931002529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4931002567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28345 + ... + 103273.

It is an arithmetic number, because the mean of its divisors is an integer number (1232785825).

Almost surely, 2^4931002561 is an apocalyptic number.

It is an amenable number.

4931002561 is a deficient number, since it is larger than the sum of its proper divisors (140739).

4931002561 is an equidigital number, since it uses as much as digits as its factorization.

4931002561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140738.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 4931002561 is about 70221.0976915058. The cubic root of 4931002561 is about 1702.0738889161.

The spelling of 4931002561 in words is "four billion, nine hundred thirty-one million, two thousand, five hundred sixty-one".