6449974541 has 2 divisors, whose sum is σ = 6449974542. Its totient is φ = 6449974540.

The previous prime is 6449974537. The next prime is 6449974589. The reversal of 6449974541 is 1454799446.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5423733316 + 1026241225 = 73646^2 + 32035^2 .

It is a cyclic number.

It is not a de Polignac number, because 6449974541 - 2² = 6449974537 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6449974241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3224987270 + 3224987271.

It is an arithmetic number, because the mean of its divisors is an integer number (3224987271).

Almost surely, 2^6449974541 is an apocalyptic number.

It is an amenable number.

6449974541 is a deficient number, since it is larger than the sum of its proper divisors (1).

6449974541 is an equidigital number, since it uses as much as digits as its factorization.

6449974541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4354560, while the sum is 53.

The square root of 6449974541 is about 80311.7335200779. The cubic root of 6449974541 is about 1861.4555359206.

The spelling of 6449974541 in words is "six billion, four hundred forty-nine million, nine hundred seventy-four thousand, five hundred forty-one".