81074790211 has 8 divisors (see below), whose sum is σ = 81991949760. Its totient is φ = 80157768768.

The previous prime is 81074790197. The next prime is 81074790221. The reversal of 81074790211 is 11209747018.

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 81074790211 - 2⁵ = 81074790179 is a prime.

It is a super-2 number, since 2×81074790211² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81074790221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1559245 + ... + 1610401.

It is an arithmetic number, because the mean of its divisors is an integer number (10248993720).

Almost surely, 2^81074790211 is an apocalyptic number.

81074790211 is a deficient number, since it is larger than the sum of its proper divisors (917159549).

81074790211 is a wasteful number, since it uses less digits than its factorization.

81074790211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69053.

The product of its (nonzero) digits is 28224, while the sum is 40.

The spelling of 81074790211 in words is "eighty-one billion, seventy-four million, seven hundred ninety thousand, two hundred eleven".