81283816932055 has 16 divisors (see below), whose sum is σ = 98515158303744. Its totient is φ = 64377688505760.

The previous prime is 81283816932053. The next prime is 81283816932089. The reversal of 81283816932055 is 55023961838218.

It is not a de Polignac number, because 81283816932055 - 2¹ = 81283816932053 is a prime.

It is a super-2 number, since 2×81283816932055² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 81283816931984 and 81283816932002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81283816932053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20260159 + ... + 23938288.

It is an arithmetic number, because the mean of its divisors is an integer number (6157197393984).

Almost surely, 2^{81283816932055} is an apocalyptic number.

81283816932055 is a deficient number, since it is larger than the sum of its proper divisors (17231341371689).

81283816932055 is a wasteful number, since it uses less digits than its factorization.

81283816932055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44202126.

The product of its (nonzero) digits is 24883200, while the sum is 61.

The spelling of 81283816932055 in words is "eighty-one trillion, two hundred eighty-three billion, eight hundred sixteen million, nine hundred thirty-two thousand, fifty-five".