4145521601 has 4 divisors (see below), whose sum is σ = 4464407892. Its totient is φ = 3826635312.

The previous prime is 4145521577. The next prime is 4145521607. The reversal of 4145521601 is 1061255414.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1061255414 = 2 ⋅530627707.

It can be written as a sum of positive squares in 2 ways, for example, as 853516225 + 3292005376 = 29215^2 + 57376^2 .

It is a cyclic number.

It is not a de Polignac number, because 4145521601 - 2⁶ = 4145521537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4145521607) 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, 159443126 + ... + 159443151.

It is an arithmetic number, because the mean of its divisors is an integer number (1116101973).

Almost surely, 2^4145521601 is an apocalyptic number.

It is an amenable number.

4145521601 is a deficient number, since it is larger than the sum of its proper divisors (318886291).

4145521601 is a wasteful number, since it uses less digits than its factorization.

4145521601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318886290.

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 4145521601 is about 64385.7251337593. The cubic root of 4145521601 is about 1606.4223118328.

The spelling of 4145521601 in words is "four billion, one hundred forty-five million, five hundred twenty-one thousand, six hundred one".