45345207661 has 12 divisors (see below), whose sum is σ = 50188809972. Its totient is φ = 40725825408.

The previous prime is 45345207647. The next prime is 45345207673. The reversal of 45345207661 is 16670254354.

It can be written as a sum of positive squares in 6 ways, for example, as 9598120900 + 35747086761 = 97970^2 + 189069^2 .

It is not a de Polignac number, because 45345207661 - 2¹³ = 45345199469 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 (45345207631) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1256160 + ... + 1291753.

It is an arithmetic number, because the mean of its divisors is an integer number (4182400831).

Almost surely, 2^45345207661 is an apocalyptic number.

It is an amenable number.

45345207661 is a deficient number, since it is larger than the sum of its proper divisors (4843602311).

45345207661 is a wasteful number, since it uses less digits than its factorization.

45345207661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2548000 (or 2547963 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 43.

The spelling of 45345207661 in words is "forty-five billion, three hundred forty-five million, two hundred seven thousand, six hundred sixty-one".