2649881401 has 2 divisors, whose sum is σ = 2649881402. Its totient is φ = 2649881400.

The previous prime is 2649881369. The next prime is 2649881441. The reversal of 2649881401 is 1041889462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1470645801 + 1179235600 = 38349^2 + 34340^2 .

It is a cyclic number.

It is not a de Polignac number, because 2649881401 - 2⁵ = 2649881369 is a prime.

It is not a weakly prime, because it can be changed into another prime (2649881441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1324940700 + 1324940701.

It is an arithmetic number, because the mean of its divisors is an integer number (1324940701).

Almost surely, 2^2649881401 is an apocalyptic number.

It is an amenable number.

2649881401 is a deficient number, since it is larger than the sum of its proper divisors (1).

2649881401 is an equidigital number, since it uses as much as digits as its factorization.

2649881401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 110592, while the sum is 43.

The square root of 2649881401 is about 51476.9987567263. The cubic root of 2649881401 is about 1383.8068592411.

The spelling of 2649881401 in words is "two billion, six hundred forty-nine million, eight hundred eighty-one thousand, four hundred one".