2155641146 has 8 divisors (see below), whose sum is σ = 3245135700. Its totient is φ = 1073929248.

The previous prime is 2155641109. The next prime is 2155641149. The reversal of 2155641146 is 6411465512.

It can be written as a sum of positive squares in 2 ways, for example, as 2153424025 + 2217121 = 46405^2 + 1489^2 .

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

It is not an unprimeable number, because it can be changed into a prime (2155641149) 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, 1944971 + ... + 1946078.

Almost surely, 2^2155641146 is an apocalyptic number.

2155641146 is a deficient number, since it is larger than the sum of its proper divisors (1089494554).

2155641146 is a wasteful number, since it uses less digits than its factorization.

2155641146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3891328.

The product of its digits is 28800, while the sum is 35.

The square root of 2155641146 is about 46428.8826701656. The cubic root of 2155641146 is about 1291.7907038115.

The spelling of 2155641146 in words is "two billion, one hundred fifty-five million, six hundred forty-one thousand, one hundred forty-six".