6403680541 has 2 divisors, whose sum is σ = 6403680542. Its totient is φ = 6403680540.

The previous prime is 6403680527. The next prime is 6403680551. The reversal of 6403680541 is 1450863046.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5863118041 + 540562500 = 76571^2 + 23250^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6403680541 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6403680541.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6403680551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3201840270 + 3201840271.

It is an arithmetic number, because the mean of its divisors is an integer number (3201840271).

Almost surely, 2^6403680541 is an apocalyptic number.

It is an amenable number.

6403680541 is a deficient number, since it is larger than the sum of its proper divisors (1).

6403680541 is an equidigital number, since it uses as much as digits as its factorization.

6403680541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 6403680541 is about 80023.0000749784. Note that the first 4 decimals coincide. The cubic root of 6403680541 is about 1856.9913726998.

The spelling of 6403680541 in words is "six billion, four hundred three million, six hundred eighty thousand, five hundred forty-one".