81935950119 has 8 divisors (see below), whose sum is σ = 111309215472. Its totient is φ = 53593325760.

The previous prime is 81935950079. The next prime is 81935950121. The reversal of 81935950119 is 91105953918.

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

It is not a de Polignac number, because 81935950119 - 2³⁶ = 13216473383 is a prime.

It is a super-2 number, since 2×81935950119² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81935950219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 257660062 + ... + 257660379.

It is an arithmetic number, because the mean of its divisors is an integer number (13913651934).

Almost surely, 2^81935950119 is an apocalyptic number.

81935950119 is a deficient number, since it is larger than the sum of its proper divisors (29373265353).

81935950119 is a wasteful number, since it uses less digits than its factorization.

81935950119 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515320497.

The product of its (nonzero) digits is 437400, while the sum is 51.

The spelling of 81935950119 in words is "eighty-one billion, nine hundred thirty-five million, nine hundred fifty thousand, one hundred nineteen".