2045325661 has 4 divisors (see below), whose sum is σ = 2152974400. Its totient is φ = 1937676924.

The previous prime is 2045325593. The next prime is 2045325673. The reversal of 2045325661 is 1665235402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2045325661 - 2¹¹ = 2045323613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2045325691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53824341 + ... + 53824378.

It is an arithmetic number, because the mean of its divisors is an integer number (538243600).

Almost surely, 2^2045325661 is an apocalyptic number.

It is an amenable number.

2045325661 is a deficient number, since it is larger than the sum of its proper divisors (107648739).

2045325661 is a wasteful number, since it uses less digits than its factorization.

2045325661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107648738.

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 2045325661 is about 45225.2767929617. The cubic root of 2045325661 is about 1269.3678340562.

The spelling of 2045325661 in words is "two billion, forty-five million, three hundred twenty-five thousand, six hundred sixty-one".