2161051766 has 8 divisors (see below), whose sum is σ = 3251804400. Its totient is φ = 1077116968.

The previous prime is 2161051727. The next prime is 2161051769. The reversal of 2161051766 is 6671501612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161051769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1703666 + ... + 1704933.

It is an arithmetic number, because the mean of its divisors is an integer number (406475550).

Almost surely, 2^2161051766 is an apocalyptic number.

2161051766 is a deficient number, since it is larger than the sum of its proper divisors (1090752634).

2161051766 is a wasteful number, since it uses less digits than its factorization.

2161051766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3408918.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 2161051766 is about 46487.1139779617. The cubic root of 2161051766 is about 1292.8705911921.

The spelling of 2161051766 in words is "two billion, one hundred sixty-one million, fifty-one thousand, seven hundred sixty-six".