2045665403 has 12 divisors (see below), whose sum is σ = 2187514992. Its totient is φ = 1912540800.

The previous prime is 2045665397. The next prime is 2045665409. The reversal of 2045665403 is 3045665402.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2045665397) and next prime (2045665409).

It is not a de Polignac number, because 2045665403 - 2⁶ = 2045665339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2045665409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20201 + ... + 67077.

It is an arithmetic number, because the mean of its divisors is an integer number (182292916).

Almost surely, 2^2045665403 is an apocalyptic number.

2045665403 is a deficient number, since it is larger than the sum of its proper divisors (141849589).

2045665403 is a wasteful number, since it uses less digits than its factorization.

2045665403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47062 (or 47045 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 35.

The square root of 2045665403 is about 45229.0327444662. The cubic root of 2045665403 is about 1269.4381136045.

Subtracting 2045665403 from its reverse (3045665402), we obtain a palindrome (999999999).

The spelling of 2045665403 in words is "two billion, forty-five million, six hundred sixty-five thousand, four hundred three".