81327961060 has 12 divisors (see below), whose sum is σ = 170788718268. Its totient is φ = 32531184416.

The previous prime is 81327961051. The next prime is 81327961067. The reversal of 81327961060 is 6016972318.

It can be written as a sum of positive squares in 2 ways, for example, as 59836987456 + 21490973604 = 244616^2 + 146598^2 .

It is a super-2 number, since 2×81327961060² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 81327960998 and 81327961016.

It is not an unprimeable number, because it can be changed into a prime (81327961067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2033199007 + ... + 2033199046.

It is an arithmetic number, because the mean of its divisors is an integer number (14232393189).

Almost surely, 2^81327961060 is an apocalyptic number.

It is an amenable number.

81327961060 is an abundant number, since it is smaller than the sum of its proper divisors (89460757208).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81327961060 is a wasteful number, since it uses less digits than its factorization.

81327961060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4066398062 (or 4066398060 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 43.

The spelling of 81327961060 in words is "eighty-one billion, three hundred twenty-seven million, nine hundred sixty-one thousand, sixty".