2045506813 has 12 divisors (see below), whose sum is σ = 2419800480. Its totient is φ = 1723572312.

The previous prime is 2045506783. The next prime is 2045506819. The reversal of 2045506813 is 3186055402.

It is not a de Polignac number, because 2045506813 - 2²⁵ = 2011952381 is a prime.

It is a super-3 number, since 3×2045506813³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2045506819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 350881 + ... + 356662.

It is an arithmetic number, because the mean of its divisors is an integer number (201650040).

Almost surely, 2^2045506813 is an apocalyptic number.

It is an amenable number.

2045506813 is a deficient number, since it is larger than the sum of its proper divisors (374293667).

2045506813 is an equidigital number, since it uses as much as digits as its factorization.

2045506813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707616 (or 707609 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 2045506813 is about 45227.2795224298. The cubic root of 2045506813 is about 1269.4053084037.

The spelling of 2045506813 in words is "two billion, forty-five million, five hundred six thousand, eight hundred thirteen".