1640929853 has 2 divisors, whose sum is σ = 1640929854. Its totient is φ = 1640929852.

The previous prime is 1640929831. The next prime is 1640929877. The reversal of 1640929853 is 3589290461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1398909604 + 242020249 = 37402^2 + 15557^2 .

It is a cyclic number.

It is not a de Polignac number, because 1640929853 - 2⁸ = 1640929597 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1640929798 and 1640929807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1640929553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820464926 + 820464927.

It is an arithmetic number, because the mean of its divisors is an integer number (820464927).

Almost surely, 2^1640929853 is an apocalyptic number.

It is an amenable number.

1640929853 is a deficient number, since it is larger than the sum of its proper divisors (1).

1640929853 is an equidigital number, since it uses as much as digits as its factorization.

1640929853 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 466560, while the sum is 47.

The square root of 1640929853 is about 40508.3923773827. The cubic root of 1640929853 is about 1179.4965421441.

The spelling of 1640929853 in words is "one billion, six hundred forty million, nine hundred twenty-nine thousand, eight hundred fifty-three".