4125665161 has 4 divisors (see below), whose sum is σ = 4130022672. Its totient is φ = 4121307652.

The previous prime is 4125665119. The next prime is 4125665183. The reversal of 4125665161 is 1615665214.

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 4125665161 - 2¹⁷ = 4125534089 is a prime.

It is a super-2 number, since 2×4125665161² = 34042226041378311842, which contains 22 as substring.

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 4125665161.

It is not an unprimeable number, because it can be changed into a prime (4125662161) 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, 2177335 + ... + 2179228.

It is an arithmetic number, because the mean of its divisors is an integer number (1032505668).

Almost surely, 2^4125665161 is an apocalyptic number.

It is an amenable number.

4125665161 is a deficient number, since it is larger than the sum of its proper divisors (4357511).

4125665161 is an equidigital number, since it uses as much as digits as its factorization.

4125665161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4357510.

The product of its digits is 43200, while the sum is 37.

The square root of 4125665161 is about 64231.3409559539. The cubic root of 4125665161 is about 1603.8533634656.

The spelling of 4125665161 in words is "four billion, one hundred twenty-five million, six hundred sixty-five thousand, one hundred sixty-one".