400085302861 has 2 divisors, whose sum is σ = 400085302862. Its totient is φ = 400085302860.

The previous prime is 400085302849. The next prime is 400085302871. The reversal of 400085302861 is 168203580004.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 224386005636 + 175699297225 = 473694^2 + 419165^2 .

It is a cyclic number.

It is not a de Polignac number, because 400085302861 - 2⁵ = 400085302829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 400085302861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400085302801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200042651430 + 200042651431.

It is an arithmetic number, because the mean of its divisors is an integer number (200042651431).

Almost surely, 2^400085302861 is an apocalyptic number.

It is an amenable number.

400085302861 is a deficient number, since it is larger than the sum of its proper divisors (1).

400085302861 is an equidigital number, since it uses as much as digits as its factorization.

400085302861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46080, while the sum is 37.

Adding to 400085302861 its reverse (168203580004), we get a palindrome (568288882865).

The spelling of 400085302861 in words is "four hundred billion, eighty-five million, three hundred two thousand, eight hundred sixty-one".