3809701561 has 4 divisors (see below), whose sum is σ = 3810057472. Its totient is φ = 3809345652.

The previous prime is 3809701529. The next prime is 3809701579. The reversal of 3809701561 is 1651079083.

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 a cyclic number.

It is not a de Polignac number, because 3809701561 - 2⁵ = 3809701529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3809701501) 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, 161385 + ... + 183478.

It is an arithmetic number, because the mean of its divisors is an integer number (952514368).

Almost surely, 2^3809701561 is an apocalyptic number.

It is an amenable number.

3809701561 is a deficient number, since it is larger than the sum of its proper divisors (355911).

3809701561 is a wasteful number, since it uses less digits than its factorization.

3809701561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355910.

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 3809701561 is about 61722.7799195726. The cubic root of 3809701561 is about 1561.8176218290.

The spelling of 3809701561 in words is "three billion, eight hundred nine million, seven hundred one thousand, five hundred sixty-one".