81463826115 has 64 divisors (see below), whose sum is σ = 166224614400. Its totient is φ = 37080675072.

The previous prime is 81463826089. The next prime is 81463826183. The reversal of 81463826115 is 51162836418.

81463826115 is a `hidden beast` number, since 8 + 1 + 4 + 638 + 2 + 6 + 1 + 1 + 5 = 666.

It is not a de Polignac number, because 81463826115 - 2¹³ = 81463817923 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 35196 + ... + 405174.

It is an arithmetic number, because the mean of its divisors is an integer number (2597259600).

Almost surely, 2^81463826115 is an apocalyptic number.

81463826115 is an abundant number, since it is smaller than the sum of its proper divisors (84760788285).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81463826115 is a wasteful number, since it uses less digits than its factorization.

81463826115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370233 (or 370227 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The spelling of 81463826115 in words is "eighty-one billion, four hundred sixty-three million, eight hundred twenty-six thousand, one hundred fifteen".