995686561 has 2 divisors, whose sum is σ = 995686562. Its totient is φ = 995686560.

The previous prime is 995686547. The next prime is 995686603. The reversal of 995686561 is 165686599.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 547560000 + 448126561 = 23400^2 + 21169^2 .

It is a cyclic number.

It is not a de Polignac number, because 995686561 - 2⁵ = 995686529 is a prime.

It is not a weakly prime, because it can be changed into another prime (995686511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 497843280 + 497843281.

It is an arithmetic number, because the mean of its divisors is an integer number (497843281).

Almost surely, 2^995686561 is an apocalyptic number.

It is an amenable number.

995686561 is a deficient number, since it is larger than the sum of its proper divisors (1).

995686561 is an equidigital number, since it uses as much as digits as its factorization.

995686561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3499200, while the sum is 55.

The square root of 995686561 is about 31554.5014379882. The cubic root of 995686561 is about 998.5601147255.

The spelling of 995686561 in words is "nine hundred ninety-five million, six hundred eighty-six thousand, five hundred sixty-one".