856250988653 has 2 divisors, whose sum is σ = 856250988654. Its totient is φ = 856250988652.

The previous prime is 856250988641. The next prime is 856250988731. The reversal of 856250988653 is 356889052658.

856250988653 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 845586915364 + 10664073289 = 919558^2 + 103267^2 .

It is a cyclic number.

It is not a de Polignac number, because 856250988653 - 2⁶ = 856250988589 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 856250988653.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (856250984653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428125494326 + 428125494327.

It is an arithmetic number, because the mean of its divisors is an integer number (428125494327).

Almost surely, 2^856250988653 is an apocalyptic number.

It is an amenable number.

856250988653 is a deficient number, since it is larger than the sum of its proper divisors (1).

856250988653 is an equidigital number, since it uses as much as digits as its factorization.

856250988653 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416000, while the sum is 65.

The spelling of 856250988653 in words is "eight hundred fifty-six billion, two hundred fifty million, nine hundred eighty-eight thousand, six hundred fifty-three".