4961641687 has 4 divisors (see below), whose sum is σ = 5017390560. Its totient is φ = 4905892816.

The previous prime is 4961641669. The next prime is 4961641717. The reversal of 4961641687 is 7861461694.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4961641687 - 2¹⁵ = 4961608919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4961644687) 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, 27874303 + ... + 27874480.

It is an arithmetic number, because the mean of its divisors is an integer number (1254347640).

Almost surely, 2^4961641687 is an apocalyptic number.

4961641687 is a deficient number, since it is larger than the sum of its proper divisors (55748873).

4961641687 is an equidigital number, since it uses as much as digits as its factorization.

4961641687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55748872.

The product of its digits is 1741824, while the sum is 52.

The square root of 4961641687 is about 70438.9216768684. The cubic root of 4961641687 is about 1705.5919304203.

The spelling of 4961641687 in words is "four billion, nine hundred sixty-one million, six hundred forty-one thousand, six hundred eighty-seven".