2158493663 has 2 divisors, whose sum is σ = 2158493664. Its totient is φ = 2158493662.

The previous prime is 2158493653. The next prime is 2158493683. The reversal of 2158493663 is 3663948512.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2158493663 is a prime.

It is a super-2 number, since 2×2158493663² = 9318189786422315138, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2158493653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1079246831 + 1079246832.

It is an arithmetic number, because the mean of its divisors is an integer number (1079246832).

Almost surely, 2^2158493663 is an apocalyptic number.

2158493663 is a deficient number, since it is larger than the sum of its proper divisors (1).

2158493663 is an equidigital number, since it uses as much as digits as its factorization.

2158493663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 47.

The square root of 2158493663 is about 46459.5917222698. The cubic root of 2158493663 is about 1292.3602529653.

The spelling of 2158493663 in words is "two billion, one hundred fifty-eight million, four hundred ninety-three thousand, six hundred sixty-three".