651644141 has 2 divisors, whose sum is σ = 651644142. Its totient is φ = 651644140.

The previous prime is 651644131. The next prime is 651644167. The reversal of 651644141 is 141446156.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 616479241 + 35164900 = 24829^2 + 5930^2 .

It is a cyclic number.

It is not a de Polignac number, because 651644141 - 2²⁶ = 584535277 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 651644098 and 651644107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (651644101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325822070 + 325822071.

It is an arithmetic number, because the mean of its divisors is an integer number (325822071).

Almost surely, 2^651644141 is an apocalyptic number.

It is an amenable number.

651644141 is a deficient number, since it is larger than the sum of its proper divisors (1).

651644141 is an equidigital number, since it uses as much as digits as its factorization.

651644141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 32.

The square root of 651644141 is about 25527.3214615243. The cubic root of 651644141 is about 866.9688592302.

The spelling of 651644141 in words is "six hundred fifty-one million, six hundred forty-four thousand, one hundred forty-one".