81199592395 has 8 divisors (see below), whose sum is σ = 98084806560. Its totient is φ = 64529476800.

The previous prime is 81199592351. The next prime is 81199592429. The reversal of 81199592395 is 59329599118.

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

It is not a de Polignac number, because 81199592395 - 2⁷ = 81199592267 is a prime.

It is a super-2 number, since 2×81199592395² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53773810 + ... + 53775319.

It is an arithmetic number, because the mean of its divisors is an integer number (12260600820).

Almost surely, 2^81199592395 is an apocalyptic number.

81199592395 is a deficient number, since it is larger than the sum of its proper divisors (16885214165).

81199592395 is a wasteful number, since it uses less digits than its factorization.

81199592395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107549285.

The product of its digits is 7873200, while the sum is 61.

The spelling of 81199592395 in words is "eighty-one billion, one hundred ninety-nine million, five hundred ninety-two thousand, three hundred ninety-five".