4721862161 has 2 divisors, whose sum is σ = 4721862162. Its totient is φ = 4721862160.

The previous prime is 4721862143. The next prime is 4721862181. The reversal of 4721862161 is 1612681274.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2775287761 + 1946574400 = 52681^2 + 44120^2 .

It is a cyclic number.

It is not a de Polignac number, because 4721862161 - 2²⁶ = 4654753297 is a prime.

It is not a weakly prime, because it can be changed into another prime (4721862181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2360931080 + 2360931081.

It is an arithmetic number, because the mean of its divisors is an integer number (2360931081).

Almost surely, 2^4721862161 is an apocalyptic number.

It is an amenable number.

4721862161 is a deficient number, since it is larger than the sum of its proper divisors (1).

4721862161 is an equidigital number, since it uses as much as digits as its factorization.

4721862161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 38.

The square root of 4721862161 is about 68715.8072134789. The cubic root of 4721862161 is about 1677.6618741670.

The spelling of 4721862161 in words is "four billion, seven hundred twenty-one million, eight hundred sixty-two thousand, one hundred sixty-one".