4051645613 has 4 divisors (see below), whose sum is σ = 4072212540. Its totient is φ = 4031078688.

The previous prime is 4051645607. The next prime is 4051645643. The reversal of 4051645613 is 3165461504.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1789882249 + 2261763364 = 42307^2 + 47558^2 .

It is a cyclic number.

It is not a de Polignac number, because 4051645613 - 2¹⁰ = 4051644589 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 (4051645643) 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, 10283168 + ... + 10283561.

It is an arithmetic number, because the mean of its divisors is an integer number (1018053135).

Almost surely, 2^4051645613 is an apocalyptic number.

It is an amenable number.

4051645613 is a deficient number, since it is larger than the sum of its proper divisors (20566927).

4051645613 is a wasteful number, since it uses less digits than its factorization.

4051645613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20566926.

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 4051645613 is about 63652.5381504933. The cubic root of 4051645613 is about 1594.2037164850.

The spelling of 4051645613 in words is "four billion, fifty-one million, six hundred forty-five thousand, six hundred thirteen".