1649610253 has 2 divisors, whose sum is σ = 1649610254. Its totient is φ = 1649610252.

The previous prime is 1649610241. The next prime is 1649610271. The reversal of 1649610253 is 3520169461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1648522404 + 1087849 = 40602^2 + 1043^2 .

It is a cyclic number.

It is not a de Polignac number, because 1649610253 - 2¹³ = 1649602061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1649610233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 824805126 + 824805127.

It is an arithmetic number, because the mean of its divisors is an integer number (824805127).

Almost surely, 2^1649610253 is an apocalyptic number.

It is an amenable number.

1649610253 is a deficient number, since it is larger than the sum of its proper divisors (1).

1649610253 is an equidigital number, since it uses as much as digits as its factorization.

1649610253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 1649610253 is about 40615.3942859109. The cubic root of 1649610253 is about 1181.5727025992.

The spelling of 1649610253 in words is "one billion, six hundred forty-nine million, six hundred ten thousand, two hundred fifty-three".