2156061466 has 16 divisors (see below), whose sum is σ = 3484038600. Its totient is φ = 994771008.

The previous prime is 2156061437. The next prime is 2156061487. The reversal of 2156061466 is 6641606512.

It can be written as a sum of positive squares in 4 ways, for example, as 1699170841 + 456890625 = 41221^2 + 21375^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75880 + ... + 100348.

Almost surely, 2^2156061466 is an apocalyptic number.

2156061466 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2156061466 is a deficient number, since it is larger than the sum of its proper divisors (1327977134).

2156061466 is a wasteful number, since it uses less digits than its factorization.

2156061466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27873.

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

The square root of 2156061466 is about 46433.4089422691. The cubic root of 2156061466 is about 1291.8746587535.

Adding to 2156061466 its reverse (6641606512), we get a palindrome (8797667978).

The spelling of 2156061466 in words is "two billion, one hundred fifty-six million, sixty-one thousand, four hundred sixty-six".