2156134621063 has 2 divisors, whose sum is σ = 2156134621064. Its totient is φ = 2156134621062.

The previous prime is 2156134621061. The next prime is 2156134621111. The reversal of 2156134621063 is 3601264316512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2156134621063 - 2¹ = 2156134621061 is a prime.

Together with 2156134621061, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2156134621061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078067310531 + 1078067310532.

It is an arithmetic number, because the mean of its divisors is an integer number (1078067310532).

Almost surely, 2^{2156134621063} is an apocalyptic number.

2156134621063 is a deficient number, since it is larger than the sum of its proper divisors (1).

2156134621063 is an equidigital number, since it uses as much as digits as its factorization.

2156134621063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 40.

Adding to 2156134621063 its reverse (3601264316512), we get a palindrome (5757398937575).

The spelling of 2156134621063 in words is "two trillion, one hundred fifty-six billion, one hundred thirty-four million, six hundred twenty-one thousand, sixty-three".