1856220136723 has 2 divisors, whose sum is σ = 1856220136724. Its totient is φ = 1856220136722.

The previous prime is 1856220136703. The next prime is 1856220136747. The reversal of 1856220136723 is 3276310226581.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1856220136723 - 2²⁹ = 1855683265811 is a prime.

It is not a weakly prime, because it can be changed into another prime (1856220136703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 928110068361 + 928110068362.

It is an arithmetic number, because the mean of its divisors is an integer number (928110068362).

Almost surely, 2^{1856220136723} is an apocalyptic number.

1856220136723 is a deficient number, since it is larger than the sum of its proper divisors (1).

1856220136723 is an equidigital number, since it uses as much as digits as its factorization.

1856220136723 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725760, while the sum is 46.

The spelling of 1856220136723 in words is "one trillion, eight hundred fifty-six billion, two hundred twenty million, one hundred thirty-six thousand, seven hundred twenty-three".