1656536238823 has 2 divisors, whose sum is σ = 1656536238824. Its totient is φ = 1656536238822.

The previous prime is 1656536238817. The next prime is 1656536238887. The reversal of 1656536238823 is 3288326356561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1656536238823 - 2²¹ = 1656534141671 is a prime.

It is a super-2 number, since 2×1656536238823² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1656536239823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 828268119411 + 828268119412.

It is an arithmetic number, because the mean of its divisors is an integer number (828268119412).

Almost surely, 2^{1656536238823} is an apocalyptic number.

1656536238823 is a deficient number, since it is larger than the sum of its proper divisors (1).

1656536238823 is an equidigital number, since it uses as much as digits as its factorization.

1656536238823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37324800, while the sum is 58.

The spelling of 1656536238823 in words is "one trillion, six hundred fifty-six billion, five hundred thirty-six million, two hundred thirty-eight thousand, eight hundred twenty-three".