81025260311 has 8 divisors (see below), whose sum is σ = 85801435344. Its totient is φ = 76250194560.

The previous prime is 81025260299. The next prime is 81025260319. The reversal of 81025260311 is 11306252018.

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 81025260311 - 2¹⁴ = 81025243927 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 (81025260319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124520 + ... + 421373.

It is an arithmetic number, because the mean of its divisors is an integer number (10725179418).

Almost surely, 2^81025260311 is an apocalyptic number.

81025260311 is a deficient number, since it is larger than the sum of its proper divisors (4776175033).

81025260311 is a wasteful number, since it uses less digits than its factorization.

81025260311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554641.

The product of its (nonzero) digits is 2880, while the sum is 29.

The spelling of 81025260311 in words is "eighty-one billion, twenty-five million, two hundred sixty thousand, three hundred eleven".