82581351839811 has 48 divisors (see below), whose sum is σ = 133654436024928. Its totient is φ = 48693243571200.

The previous prime is 82581351839809. The next prime is 82581351839813. The reversal of 82581351839811 is 11893815318528.

82581351839811 is a `hidden beast` number, since 8 + 2 + 5 + 8 + 1 + 3 + 518 + 39 + 81 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (82581351839809) and next prime (82581351839813).

It is not a de Polignac number, because 82581351839811 - 2¹ = 82581351839809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (82581351839813) 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, 52547931 + ... + 54096651.

It is an arithmetic number, because the mean of its divisors is an integer number (2784467417186).

Almost surely, 2^{82581351839811} is an apocalyptic number.

82581351839811 is a deficient number, since it is larger than the sum of its proper divisors (51073084185117).

82581351839811 is a wasteful number, since it uses less digits than its factorization.

82581351839811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1563332 (or 1563329 counting only the distinct ones).

The product of its digits is 16588800, while the sum is 63.

The spelling of 82581351839811 in words is "eighty-two trillion, five hundred eighty-one billion, three hundred fifty-one million, eight hundred thirty-nine thousand, eight hundred eleven".