81676723808202 has 16 divisors (see below), whose sum is σ = 167152365003360. Its totient is φ = 26592421704912.

The previous prime is 81676723808137. The next prime is 81676723808237. The reversal of 81676723808202 is 20280832767618.

It is a super-2 number, since 2×81676723808202² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158288224177 + ... + 158288224692.

It is an arithmetic number, because the mean of its divisors is an integer number (10447022812710).

Almost surely, 2^{81676723808202} is an apocalyptic number.

81676723808202 is an abundant number, since it is smaller than the sum of its proper divisors (85475641195158).

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

81676723808202 is a wasteful number, since it uses less digits than its factorization.

81676723808202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316576448917.

The product of its (nonzero) digits is 21676032, while the sum is 60.

The spelling of 81676723808202 in words is "eighty-one trillion, six hundred seventy-six billion, seven hundred twenty-three million, eight hundred eight thousand, two hundred two".