2643513541 has 2 divisors, whose sum is σ = 2643513542. Its totient is φ = 2643513540.

The previous prime is 2643513497. The next prime is 2643513557. The reversal of 2643513541 is 1453153462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2220388641 + 423124900 = 47121^2 + 20570^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2643513541 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2643513497 and 2643513506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2643523541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1321756770 + 1321756771.

It is an arithmetic number, because the mean of its divisors is an integer number (1321756771).

Almost surely, 2^2643513541 is an apocalyptic number.

It is an amenable number.

2643513541 is a deficient number, since it is larger than the sum of its proper divisors (1).

2643513541 is an equidigital number, since it uses as much as digits as its factorization.

2643513541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43200, while the sum is 34.

The square root of 2643513541 is about 51415.1100455887. The cubic root of 2643513541 is about 1382.6975069105.

The spelling of 2643513541 in words is "two billion, six hundred forty-three million, five hundred thirteen thousand, five hundred forty-one".