4649533572821 has 2 divisors, whose sum is σ = 4649533572822. Its totient is φ = 4649533572820.

The previous prime is 4649533572767. The next prime is 4649533572917. The reversal of 4649533572821 is 1282753359464.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4636761182596 + 12772390225 = 2153314^2 + 113015^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4649533572821 is a prime.

It is a super-2 number, since 2×4649533572821² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4649533532821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2324766786410 + 2324766786411.

It is an arithmetic number, because the mean of its divisors is an integer number (2324766786411).

Almost surely, 2^{4649533572821} is an apocalyptic number.

It is an amenable number.

4649533572821 is a deficient number, since it is larger than the sum of its proper divisors (1).

4649533572821 is an equidigital number, since it uses as much as digits as its factorization.

4649533572821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43545600, while the sum is 59.

The spelling of 4649533572821 in words is "four trillion, six hundred forty-nine billion, five hundred thirty-three million, five hundred seventy-two thousand, eight hundred twenty-one".