4661436781 has 2 divisors, whose sum is σ = 4661436782. Its totient is φ = 4661436780.

The previous prime is 4661436743. The next prime is 4661436803. The reversal of 4661436781 is 1876341664.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3565164681 + 1096272100 = 59709^2 + 33110^2 .

It is a cyclic number.

It is not a de Polignac number, because 4661436781 - 2⁷ = 4661436653 is a prime.

It is a super-2 number, since 2×4661436781² = 43457985726519283922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4661436721) 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 as a sum of consecutive naturals, namely, 2330718390 + 2330718391.

It is an arithmetic number, because the mean of its divisors is an integer number (2330718391).

Almost surely, 2^4661436781 is an apocalyptic number.

It is an amenable number.

4661436781 is a deficient number, since it is larger than the sum of its proper divisors (1).

4661436781 is an equidigital number, since it uses as much as digits as its factorization.

4661436781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 46.

The square root of 4661436781 is about 68274.7155321793. The cubic root of 4661436781 is about 1670.4748169986.

The spelling of 4661436781 in words is "four billion, six hundred sixty-one million, four hundred thirty-six thousand, seven hundred eighty-one".