2146571641 has 2 divisors, whose sum is σ = 2146571642. Its totient is φ = 2146571640.

The previous prime is 2146571627. The next prime is 2146571663. The reversal of 2146571641 is 1461756412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1815186025 + 331385616 = 42605^2 + 18204^2 .

It is a cyclic number.

It is not a de Polignac number, because 2146571641 - 2⁷ = 2146571513 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2146571641.

It is not a weakly prime, because it can be changed into another prime (2146571611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1073285820 + 1073285821.

It is an arithmetic number, because the mean of its divisors is an integer number (1073285821).

Almost surely, 2^2146571641 is an apocalyptic number.

It is an amenable number.

2146571641 is a deficient number, since it is larger than the sum of its proper divisors (1).

2146571641 is an equidigital number, since it uses as much as digits as its factorization.

2146571641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 37.

The square root of 2146571641 is about 46331.1087823290. The cubic root of 2146571641 is about 1289.9764915693.

The spelling of 2146571641 in words is "two billion, one hundred forty-six million, five hundred seventy-one thousand, six hundred forty-one".