81155517733083 has 16 divisors (see below), whose sum is σ = 118523271336480. Its totient is φ = 49165208848896.

The previous prime is 81155517733027. The next prime is 81155517733093. The reversal of 81155517733083 is 38033771555118.

It is a happy number.

It is not a de Polignac number, because 81155517733083 - 2⁸ = 81155517732827 is a prime.

It is a super-3 number, since 3×81155517733083³ (a number of 43 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (81155517733013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27435940960 + ... + 27435943917.

It is an arithmetic number, because the mean of its divisors is an integer number (7407704458530).

Almost surely, 2^{81155517733083} is an apocalyptic number.

81155517733083 is a deficient number, since it is larger than the sum of its proper divisors (37367753603397).

81155517733083 is a wasteful number, since it uses less digits than its factorization.

81155517733083 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54871884926.

The product of its (nonzero) digits is 10584000, while the sum is 57.

The spelling of 81155517733083 in words is "eighty-one trillion, one hundred fifty-five billion, five hundred seventeen million, seven hundred thirty-three thousand, eighty-three".