81466733535 has 32 divisors (see below), whose sum is σ = 142235647488. Its totient is φ = 39488142720.

The previous prime is 81466733527. The next prime is 81466733587. The reversal of 81466733535 is 53533766418.

It is not a de Polignac number, because 81466733535 - 2³ = 81466733527 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 549814 + ... + 682076.

It is an arithmetic number, because the mean of its divisors is an integer number (4444863984).

Almost surely, 2^81466733535 is an apocalyptic number.

81466733535 is a deficient number, since it is larger than the sum of its proper divisors (60768913953).

81466733535 is a wasteful number, since it uses less digits than its factorization.

81466733535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136015.

The product of its digits is 5443200, while the sum is 51.

The spelling of 81466733535 in words is "eighty-one billion, four hundred sixty-six million, seven hundred thirty-three thousand, five hundred thirty-five".