4215661161 has 4 divisors (see below), whose sum is σ = 5620881552. Its totient is φ = 2810440772.

The previous prime is 4215661141. The next prime is 4215661169. The reversal of 4215661161 is 1611665124.

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 4215661161 - 2⁵ = 4215661129 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4215661169) 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, 702610191 + ... + 702610196.

It is an arithmetic number, because the mean of its divisors is an integer number (1405220388).

Almost surely, 2^4215661161 is an apocalyptic number.

It is an amenable number.

4215661161 is a deficient number, since it is larger than the sum of its proper divisors (1405220391).

4215661161 is a wasteful number, since it uses less digits than its factorization.

4215661161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1405220390.

The product of its digits is 8640, while the sum is 33.

The square root of 4215661161 is about 64928.1230361698. The cubic root of 4215661161 is about 1615.4315685356.

The spelling of 4215661161 in words is "four billion, two hundred fifteen million, six hundred sixty-one thousand, one hundred sixty-one".