81537746120054 has 16 divisors (see below), whose sum is σ = 148001287075488. Its totient is φ = 32889174905472.

The previous prime is 81537746119997. The next prime is 81537746120141. The reversal of 81537746120054 is 45002164773518.

81537746120054 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×81537746120054² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 81537746119978 and 81537746120005.

It is a congruent number.

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, 171297785729 + ... + 171297786204.

It is an arithmetic number, because the mean of its divisors is an integer number (9250080442218).

Almost surely, 2^{81537746120054} is an apocalyptic number.

81537746120054 is a deficient number, since it is larger than the sum of its proper divisors (66463540955434).

81537746120054 is a wasteful number, since it uses less digits than its factorization.

81537746120054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342595571959.

The product of its (nonzero) digits is 5644800, while the sum is 53.

The spelling of 81537746120054 in words is "eighty-one trillion, five hundred thirty-seven billion, seven hundred forty-six million, one hundred twenty thousand, fifty-four".