81093365253954 has 48 divisors (see below), whose sum is σ = 176159658575160. Its totient is φ = 26960762062080.

The previous prime is 81093365253941. The next prime is 81093365253961. The reversal of 81093365253954 is 45935256339018.

81093365253954 is a `hidden beast` number, since 8 + 1 + 0 + 9 + 33 + 65 + 2 + 539 + 5 + 4 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 81027488331729 + 65876922225 = 9001527^2 + 256665^2 .

It is a super-2 number, since 2×81093365253954² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 81093365253891 and 81093365253900.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 238297084 + ... + 238637144.

Almost surely, 2^{81093365253954} is an apocalyptic number.

81093365253954 is an abundant number, since it is smaller than the sum of its proper divisors (95066293321206).

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

81093365253954 is a wasteful number, since it uses less digits than its factorization.

81093365253954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374515 (or 374512 counting only the distinct ones).

The product of its (nonzero) digits is 104976000, while the sum is 63.

The spelling of 81093365253954 in words is "eighty-one trillion, ninety-three billion, three hundred sixty-five million, two hundred fifty-three thousand, nine hundred fifty-four".