1653885641 has 2 divisors, whose sum is σ = 1653885642. Its totient is φ = 1653885640.

The previous prime is 1653885589. The next prime is 1653885661. The reversal of 1653885641 is 1465883561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 971631241 + 682254400 = 31171^2 + 26120^2 .

It is a cyclic number.

It is not a de Polignac number, because 1653885641 - 2²⁶ = 1586776777 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1653885661) 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, 826942820 + 826942821.

It is an arithmetic number, because the mean of its divisors is an integer number (826942821).

Almost surely, 2^1653885641 is an apocalyptic number.

It is an amenable number.

1653885641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1653885641 is an equidigital number, since it uses as much as digits as its factorization.

1653885641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 691200, while the sum is 47.

The square root of 1653885641 is about 40667.9928322016. The cubic root of 1653885641 is about 1182.5926048811.

The spelling of 1653885641 in words is "one billion, six hundred fifty-three million, eight hundred eighty-five thousand, six hundred forty-one".