81935039355 has 16 divisors (see below), whose sum is σ = 141180375840. Its totient is φ = 40337250048.

The previous prime is 81935039341. The next prime is 81935039401. The reversal of 81935039355 is 55393053918.

It is a happy number.

It is not a de Polignac number, because 81935039355 - 2¹¹ = 81935037307 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 81935039298 and 81935039307.

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, 210089650 + ... + 210090039.

It is an arithmetic number, because the mean of its divisors is an integer number (8823773490).

Almost surely, 2^81935039355 is an apocalyptic number.

81935039355 is a deficient number, since it is larger than the sum of its proper divisors (59245336485).

81935039355 is a wasteful number, since it uses less digits than its factorization.

81935039355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420179710.

The product of its (nonzero) digits is 2187000, while the sum is 51.

It can be divided in two parts, 819350 and 39355, that added together give a triangular number (858705 = T₁₃₁₀).

The spelling of 81935039355 in words is "eighty-one billion, nine hundred thirty-five million, thirty-nine thousand, three hundred fifty-five".