8427955081761 has 12 divisors (see below), whose sum is σ = 12889813654692. Its totient is φ = 5288128678656.

The previous prime is 8427955081709. The next prime is 8427955081787. The reversal of 8427955081761 is 1671805597248.

8427955081761 is a `hidden beast` number, since 8 + 4 + 2 + 7 + 9 + 550 + 8 + 1 + 76 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3137702078736 + 5290253003025 = 1771356^2 + 2300055^2 .

It is not a de Polignac number, because 8427955081761 - 2¹⁴ = 8427955065377 is a prime.

It is a super-2 number, since 2×8427955081761² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8427955081961) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27542336716 + ... + 27542337021.

It is an arithmetic number, because the mean of its divisors is an integer number (1074151137891).

Almost surely, 2^{8427955081761} is an apocalyptic number.

It is an amenable number.

8427955081761 is a deficient number, since it is larger than the sum of its proper divisors (4461858572931).

8427955081761 is a wasteful number, since it uses less digits than its factorization.

8427955081761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55084673760 (or 55084673757 counting only the distinct ones).

The product of its (nonzero) digits is 33868800, while the sum is 63.

The spelling of 8427955081761 in words is "eight trillion, four hundred twenty-seven billion, nine hundred fifty-five million, eighty-one thousand, seven hundred sixty-one".