81116695357 has 8 divisors (see below), whose sum is σ = 82523705472. Its totient is φ = 79717033200.

The previous prime is 81116695313. The next prime is 81116695369. The reversal of 81116695357 is 75359661118.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 81116695357 - 2³¹ = 78969211709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81116698357) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1814718 + ... + 1858879.

It is an arithmetic number, because the mean of its divisors is an integer number (10315463184).

Almost surely, 2^81116695357 is an apocalyptic number.

It is an amenable number.

81116695357 is a deficient number, since it is larger than the sum of its proper divisors (1407010115).

81116695357 is a wasteful number, since it uses less digits than its factorization.

81116695357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3673979.

The product of its digits is 1360800, while the sum is 52.

The spelling of 81116695357 in words is "eighty-one billion, one hundred sixteen million, six hundred ninety-five thousand, three hundred fifty-seven".