2155161863 has 2 divisors, whose sum is σ = 2155161864. Its totient is φ = 2155161862.

The previous prime is 2155161851. The next prime is 2155161907. The reversal of 2155161863 is 3681615512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2155161863 - 2¹⁴ = 2155145479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2155166863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077580931 + 1077580932.

It is an arithmetic number, because the mean of its divisors is an integer number (1077580932).

Almost surely, 2^2155161863 is an apocalyptic number.

2155161863 is a deficient number, since it is larger than the sum of its proper divisors (1).

2155161863 is an equidigital number, since it uses as much as digits as its factorization.

2155161863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43200, while the sum is 38.

The square root of 2155161863 is about 46423.7209086045. The cubic root of 2155161863 is about 1291.6949582500.

The spelling of 2155161863 in words is "two billion, one hundred fifty-five million, one hundred sixty-one thousand, eight hundred sixty-three".