81524040530 has 16 divisors (see below), whose sum is σ = 146753398080. Its totient is φ = 32607366192.

The previous prime is 81524040527. The next prime is 81524040551. The reversal of 81524040530 is 3504042518.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124940 + ... + 422679.

It is an arithmetic number, because the mean of its divisors is an integer number (9172087380).

Almost surely, 2^81524040530 is an apocalyptic number.

81524040530 is a deficient number, since it is larger than the sum of its proper divisors (65229357550).

81524040530 is a wasteful number, since it uses less digits than its factorization.

81524040530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562513.

The product of its (nonzero) digits is 19200, while the sum is 32.

The spelling of 81524040530 in words is "eighty-one billion, five hundred twenty-four million, forty thousand, five hundred thirty".