81959088095918 has 32 divisors (see below), whose sum is σ = 140804517065472. Its totient is φ = 35415770227200.

The previous prime is 81959088095903. The next prime is 81959088095957.

It is a happy number.

81959088095918 is nontrivially palindromic in base 10.

It is a super-3 number, since 3×81959088095918³ (a number of 43 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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, 496771763 + ... + 496936718.

It is an arithmetic number, because the mean of its divisors is an integer number (4400141158296).

Almost surely, 2^{81959088095918} is an apocalyptic number.

81959088095918 is a deficient number, since it is larger than the sum of its proper divisors (58845428969554).

81959088095918 is a wasteful number, since it uses less digits than its factorization.

81959088095918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 993708680.

The product of its (nonzero) digits is 671846400, while the sum is 80.

The spelling of 81959088095918 in words is "eighty-one trillion, nine hundred fifty-nine billion, eighty-eight million, ninety-five thousand, nine hundred eighteen".