81484551055 has 16 divisors (see below), whose sum is σ = 101016115200. Its totient is φ = 63034555680.

The previous prime is 81484551019. The next prime is 81484551097. The reversal of 81484551055 is 55015548418.

It is a happy number.

It is not a de Polignac number, because 81484551055 - 2¹¹ = 81484549007 is a prime.

It is a super-2 number, since 2×81484551055² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 81484550996 and 81484551014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13635 + ... + 403924.

It is an arithmetic number, because the mean of its divisors is an integer number (6313507200).

Almost surely, 2^81484551055 is an apocalyptic number.

81484551055 is a deficient number, since it is larger than the sum of its proper divisors (19531564145).

81484551055 is a wasteful number, since it uses less digits than its factorization.

81484551055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418854.

The product of its (nonzero) digits is 640000, while the sum is 46.

The spelling of 81484551055 in words is "eighty-one billion, four hundred eighty-four million, five hundred fifty-one thousand, fifty-five".