3904441561 has 4 divisors (see below), whose sum is σ = 4134114612. Its totient is φ = 3674768512.

The previous prime is 3904441559. The next prime is 3904441591. The reversal of 3904441561 is 1651444093.

3904441561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1651444093 = 13 ⋅127034161.

It can be written as a sum of positive squares in 2 ways, for example, as 1479863961 + 2424577600 = 38469^2 + 49240^2 .

It is a cyclic number.

It is not a de Polignac number, because 3904441561 - 2¹ = 3904441559 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3904441561.

It is not an unprimeable number, because it can be changed into a prime (3904441511) 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, 114836500 + ... + 114836533.

It is an arithmetic number, because the mean of its divisors is an integer number (1033528653).

Almost surely, 2^3904441561 is an apocalyptic number.

It is an amenable number.

3904441561 is a deficient number, since it is larger than the sum of its proper divisors (229673051).

3904441561 is a wasteful number, since it uses less digits than its factorization.

3904441561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229673050.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 3904441561 is about 62485.5308131411. The cubic root of 3904441561 is about 1574.6582358810.

The spelling of 3904441561 in words is "three billion, nine hundred four million, four hundred forty-one thousand, five hundred sixty-one".