81898234711 has 16 divisors (see below), whose sum is σ = 87873726240. Its totient is φ = 76175164800.

The previous prime is 81898234703. The next prime is 81898234727. The reversal of 81898234711 is 11743289818.

It is a cyclic number.

It is not a de Polignac number, because 81898234711 - 2³ = 81898234703 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 (81898294711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 269481 + ... + 486226.

It is an arithmetic number, because the mean of its divisors is an integer number (5492107890).

Almost surely, 2^81898234711 is an apocalyptic number.

81898234711 is a deficient number, since it is larger than the sum of its proper divisors (5975491529).

81898234711 is a wasteful number, since it uses less digits than its factorization.

81898234711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755874.

The product of its digits is 774144, while the sum is 52.

The spelling of 81898234711 in words is "eighty-one billion, eight hundred ninety-eight million, two hundred thirty-four thousand, seven hundred eleven".