81474137814810 has 32 divisors (see below), whose sum is σ = 210579310045440. Its totient is φ = 20055172385088.

The previous prime is 81474137814809. The next prime is 81474137814841. The reversal of 81474137814810 is 1841873147418.

It is a super-2 number, since 2×81474137814810² (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 15 ways as a sum of consecutive naturals, for example, 104454022450 + ... + 104454023229.

It is an arithmetic number, because the mean of its divisors is an integer number (6580603438920).

Almost surely, 2^{81474137814810} is an apocalyptic number.

81474137814810 is an abundant number, since it is smaller than the sum of its proper divisors (129105172230630).

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

81474137814810 is a wasteful number, since it uses less digits than its factorization.

81474137814810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208908045702.

The product of its (nonzero) digits is 4816896, while the sum is 57.

The spelling of 81474137814810 in words is "eighty-one trillion, four hundred seventy-four billion, one hundred thirty-seven million, eight hundred fourteen thousand, eight hundred ten".