285618325621 has 2 divisors, whose sum is σ = 285618325622. Its totient is φ = 285618325620.

The previous prime is 285618325469. The next prime is 285618325651. The reversal of 285618325621 is 126523816582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 262692126225 + 22926199396 = 512535^2 + 151414^2 .

It is a cyclic number.

It is not a de Polignac number, because 285618325621 - 2¹⁵ = 285618292853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (285618325651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142809162810 + 142809162811.

It is an arithmetic number, because the mean of its divisors is an integer number (142809162811).

Almost surely, 2^285618325621 is an apocalyptic number.

It is an amenable number.

285618325621 is a deficient number, since it is larger than the sum of its proper divisors (1).

285618325621 is an equidigital number, since it uses as much as digits as its factorization.

285618325621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1382400, while the sum is 49.

The spelling of 285618325621 in words is "two hundred eighty-five billion, six hundred eighteen million, three hundred twenty-five thousand, six hundred twenty-one".