285996178961 has 2 divisors, whose sum is σ = 285996178962. Its totient is φ = 285996178960.

The previous prime is 285996178927. The next prime is 285996179023. The reversal of 285996178961 is 169871699582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 267205252561 + 18790926400 = 516919^2 + 137080^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-285996178961 is a prime.

It is not a weakly prime, because it can be changed into another prime (285996178261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142998089480 + 142998089481.

It is an arithmetic number, because the mean of its divisors is an integer number (142998089481).

Almost surely, 2^285996178961 is an apocalyptic number.

It is an amenable number.

285996178961 is a deficient number, since it is larger than the sum of its proper divisors (1).

285996178961 is an equidigital number, since it uses as much as digits as its factorization.

285996178961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 117573120, while the sum is 71.

The spelling of 285996178961 in words is "two hundred eighty-five billion, nine hundred ninety-six million, one hundred seventy-eight thousand, nine hundred sixty-one".