5521784772649 has 2 divisors, whose sum is σ = 5521784772650. Its totient is φ = 5521784772648.

The previous prime is 5521784772641. The next prime is 5521784772719. The reversal of 5521784772649 is 9462774871255.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3600248194624 + 1921536578025 = 1897432^2 + 1386195^2 .

It is a cyclic number.

It is not a de Polignac number, because 5521784772649 - 2³ = 5521784772641 is a prime.

It is not a weakly prime, because it can be changed into another prime (5521784772641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2760892386324 + 2760892386325.

It is an arithmetic number, because the mean of its divisors is an integer number (2760892386325).

Almost surely, 2^{5521784772649} is an apocalyptic number.

It is an amenable number.

5521784772649 is a deficient number, since it is larger than the sum of its proper divisors (1).

5521784772649 is an equidigital number, since it uses as much as digits as its factorization.

5521784772649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 237081600, while the sum is 67.

The spelling of 5521784772649 in words is "five trillion, five hundred twenty-one billion, seven hundred eighty-four million, seven hundred seventy-two thousand, six hundred forty-nine".