81064248111 has 48 divisors (see below), whose sum is σ = 154573256448. Its totient is φ = 39634156800.

The previous prime is 81064248091. The next prime is 81064248119. The reversal of 81064248111 is 11184246018.

81064248111 is a `hidden beast` number, since 8 + 1 + 0 + 642 + 4 + 8 + 1 + 1 + 1 = 666.

It is not a de Polignac number, because 81064248111 - 2⁵ = 81064248079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81064248119) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3428685 + ... + 3452246.

It is an arithmetic number, because the mean of its divisors is an integer number (3220276176).

Almost surely, 2^81064248111 is an apocalyptic number.

81064248111 is a deficient number, since it is larger than the sum of its proper divisors (73509008337).

81064248111 is a wasteful number, since it uses less digits than its factorization.

81064248111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6880972 (or 6880969 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 36.

The spelling of 81064248111 in words is "eighty-one billion, sixty-four million, two hundred forty-eight thousand, one hundred eleven".